From 5f467b02fa05a8ad4feae04d355f1422de72d636 Mon Sep 17 00:00:00 2001
From: Luxferre <lux@ferre>
Date: Fri, 23 Oct 2026 14:29:48 +0300
Subject: [PATCH] feat(games): add Snake and Tetris X11 games with menu
 integration

Add two standalone X11 games (not DWM plugins) for the Nokia 8110 keypad:
- src/games/snake.cpp: Nokia Snake II-style game, 240x296, built-in 5x7 font
- src/games/tetris.cpp: Tetris with next-piece preview, levels, line clears

Both float as dialog windows in dwm, use a self-contained bitmap font (no
font-file dependency), and are controlled via the numeric keypad (2/4/6/8
directions, 5 action) with arrow-key fallbacks.

- scripts/build-games.sh: Docker armv7 cross-compile (mirrors build-sxmo-x11.sh)
- overlay/rootfs/usr/share/sxmo/default_hooks/sxmo_hook_games.sh: Games menu hook
- overlay/rootfs/usr/bin/sxmo_appmenu.sh: add 'Games' entry after 'Apps' and a
  games submenu case

Binaries committed to prebuilt/games and overlay/rootfs/usr/bin per repo
convention. Deployed and verified on the live device (window maps, dwm focuses
it, keypad input reaches the game).
---
 overlay/rootfs/usr/bin/snake                  | Bin 0 -> 13672 bytes
 overlay/rootfs/usr/bin/sxmo_appmenu.sh        |   7 +-
 overlay/rootfs/usr/bin/tetris                 | Bin 0 -> 13668 bytes
 .../sxmo/default_hooks/sxmo_hook_games.sh     |  26 +
 prebuilt/games/usr/bin/snake                  | Bin 0 -> 13672 bytes
 prebuilt/games/usr/bin/tetris                 | Bin 0 -> 13668 bytes
 scripts/build-games.sh                        |  74 +++
 src/games/snake.cpp                           | 376 +++++++++++++++
 src/games/tetris.cpp                          | 454 ++++++++++++++++++
 9 files changed, 936 insertions(+), 1 deletion(-)
 create mode 100755 overlay/rootfs/usr/bin/snake
 create mode 100755 overlay/rootfs/usr/bin/tetris
 create mode 100644 overlay/rootfs/usr/share/sxmo/default_hooks/sxmo_hook_games.sh
 create mode 100755 prebuilt/games/usr/bin/snake
 create mode 100755 prebuilt/games/usr/bin/tetris
 create mode 100755 scripts/build-games.sh
 create mode 100644 src/games/snake.cpp
 create mode 100644 src/games/tetris.cpp

diff --git a/overlay/rootfs/usr/bin/snake b/overlay/rootfs/usr/bin/snake
new file mode 100755
index 0000000000000000000000000000000000000000..a199a732a8ac4ca139d7bf28fca32b754575fcf5
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diff --git a/overlay/rootfs/usr/bin/sxmo_appmenu.sh b/overlay/rootfs/usr/bin/sxmo_appmenu.sh
index 7e07f05..c337f28 100755
--- a/overlay/rootfs/usr/bin/sxmo_appmenu.sh
+++ b/overlay/rootfs/usr/bin/sxmo_appmenu.sh
@@ -6,7 +6,7 @@ if [ "${1:-}" = "--fallback" ]; then
 	shift
 elif [ -p /tmp/dwm_plugin_dmenu.fifo ]; then
 	case "${1:-}" in
-		""|sys|applications|scripts|modem|config|power|sthotkeys)
+		""|sys|applications|scripts|modem|config|power|games|sthotkeys)
 			exec dmenu "${1:-ctx}"
 			;;
 	esac
@@ -162,6 +162,7 @@ fast_sys_choices() {
 	fi
 	CHOICES="$icon_trm Terminal^0^st -e ${SHELL:-/bin/sh}
 $icon_grd Apps^0^sxmo_appmenu.sh applications
+$icon_gam Games^0^sxmo_appmenu.sh games
 $icon_grd Scripts^0^sxmo_appmenu.sh scripts
 $icon_dir Files^0^xfiles
 $icon_phn Dialer^0^xdialer
@@ -191,6 +192,10 @@ getprogchoices() {
 				CHOICES="$(sxmo_hook_apps.sh)"
 			fi
 			;;
+		games)
+			WINNAME="Games"
+			CHOICES="$(sxmo_hook_games.sh)"
+			;;
 		scripts)
 			WINNAME="Scripts"
 			if [ -s "${XDG_RUNTIME_DIR:-/tmp}/sxmo_scripts.cache" ]; then
diff --git a/overlay/rootfs/usr/bin/tetris b/overlay/rootfs/usr/bin/tetris
new file mode 100755
index 0000000000000000000000000000000000000000..1858184e66c4e516365576c151835d0194a17b44
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/overlay/rootfs/usr/share/sxmo/default_hooks/sxmo_hook_games.sh b/overlay/rootfs/usr/share/sxmo/default_hooks/sxmo_hook_games.sh
new file mode 100644
index 0000000..49335cc
--- /dev/null
+++ b/overlay/rootfs/usr/share/sxmo/default_hooks/sxmo_hook_games.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+# configversion: 00000000000000000000000000000000
+# SPDX-License-Identifier: AGPL-3.0-only
+# Copyright 2025 Bananarchy Contributors
+# shellcheck disable=SC2154
+
+# include common definitions
+# shellcheck source=configs/default_hooks/sxmo_hook_icons.sh
+export PATH="${HOME:-/home/user}/.local/bin:${HOME:-/home/user}/.config/sxmo/hooks:/usr/share/sxmo/default_hooks:$PATH"
+. sxmo_hook_icons.sh
+
+write_line() {
+	printf "%s ^ 0 ^ %s\n" "$1" "$2"
+}
+
+write_line_app() {
+	executable="$1"
+	label="$2"
+	command="$3"
+	if command -v "$executable" >/dev/null; then
+		write_line "$label" "$command"
+	fi
+}
+
+write_line_app snake "$icon_gam Snake" "snake"
+write_line_app tetris "$icon_gam Tetris" "tetris"
diff --git a/prebuilt/games/usr/bin/snake b/prebuilt/games/usr/bin/snake
new file mode 100755
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diff --git a/prebuilt/games/usr/bin/tetris b/prebuilt/games/usr/bin/tetris
new file mode 100755
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diff --git a/scripts/build-games.sh b/scripts/build-games.sh
new file mode 100755
index 0000000..d6d9d0a
--- /dev/null
+++ b/scripts/build-games.sh
@@ -0,0 +1,74 @@
+#!/bin/sh
+# Cross-compile Bananarchy standalone X11 games (Snake, Tetris) for armv7.
+set -eu
+
+BASE_DIR="$(cd "$(dirname "$0")/.." && pwd)"
+ROOTFS_DIR="${ROOTFS_DIR:-$BASE_DIR/rootfs}"
+if [ -e "$ROOTFS_DIR" ]; then
+  ROOTFS_DIR="$(realpath "$ROOTFS_DIR")"
+fi
+
+exec docker run --rm --network=host \
+  -e HOST_UID="$(id -u)" \
+  -e HOST_GID="$(id -g)" \
+  -v "$BASE_DIR:/bananarchy" \
+  -v "$ROOTFS_DIR:/target-rootfs" \
+  alpine:3.24 sh -eu -c '
+  cat > /etc/apk/repositories <<EOF
+https://mirror.nura.eco/postmarketos/v26.06
+https://dl-cdn.alpinelinux.org/alpine/edge/main
+https://dl-cdn.alpinelinux.org/alpine/edge/community
+https://dl-cdn.alpinelinux.org/alpine/edge/testing
+EOF
+  cp /bananarchy/keys/* /etc/apk/keys/
+
+  echo "[1/4] Installing host cross-compilation toolchain..."
+  apk add --no-cache \
+    build-base \
+    gcc-armv7 \
+    g++-armv7 \
+    binutils-armv7 \
+    pkgconf >/dev/null
+
+  echo "[2/4] Preparing armv7 sysroot (X11)..."
+  SYSROOT="/tmp/armv7-sysroot"
+  mkdir -p "$SYSROOT/etc/apk/keys"
+  cp /etc/apk/repositories "$SYSROOT/etc/apk/repositories"
+  cp /etc/apk/keys/* "$SYSROOT/etc/apk/keys/"
+  apk --root "$SYSROOT" --initdb --arch armv7 add --no-scripts \
+    alpine-baselayout \
+    musl-dev \
+    linux-headers \
+    libx11-dev >/dev/null
+
+  export PKG_CONFIG_SYSROOT_DIR="$SYSROOT"
+  export PKG_CONFIG_LIBDIR="$SYSROOT/usr/lib/pkgconfig:$SYSROOT/usr/share/pkgconfig"
+  CC="armv7-alpine-linux-musleabihf-gcc --sysroot=$SYSROOT"
+  CXX="armv7-alpine-linux-musleabihf-g++ --sysroot=$SYSROOT"
+  STRIP="armv7-alpine-linux-musleabihf-strip"
+  OPT_CFLAGS="-O2 -march=armv7-a -mtune=cortex-a7 -mfpu=neon-vfpv4 -mfloat-abi=hard -fno-plt -fomit-frame-pointer"
+
+  mkdir -p /bananarchy/prebuilt/games/usr/bin
+
+  echo "[3/4] Compiling Snake and Tetris..."
+  $CXX $OPT_CFLAGS -std=c++17 -Wall -Wextra \
+    /bananarchy/src/games/snake.cpp $(pkgconf --libs x11) \
+    -o /bananarchy/prebuilt/games/usr/bin/snake
+  $CXX $OPT_CFLAGS -std=c++17 -Wall -Wextra \
+    /bananarchy/src/games/tetris.cpp $(pkgconf --libs x11) \
+    -o /bananarchy/prebuilt/games/usr/bin/tetris
+  $STRIP --strip-unneeded /bananarchy/prebuilt/games/usr/bin/snake /bananarchy/prebuilt/games/usr/bin/tetris
+
+  echo "[4/4] Installing into overlay and (optional) target rootfs..."
+  mkdir -p /bananarchy/overlay/rootfs/usr/bin
+  cp -a /bananarchy/prebuilt/games/usr/bin/. /bananarchy/overlay/rootfs/usr/bin/
+  if [ -d /target-rootfs/usr/bin ]; then
+    cp -a /bananarchy/prebuilt/games/usr/bin/. /target-rootfs/usr/bin/
+  fi
+
+  chown -R "$HOST_UID:$HOST_GID" \
+    /bananarchy/prebuilt/games \
+    /bananarchy/overlay/rootfs/usr/bin \
+    /bananarchy/src/games
+  ls -lh /bananarchy/prebuilt/games/usr/bin/snake /bananarchy/prebuilt/games/usr/bin/tetris
+'
diff --git a/src/games/snake.cpp b/src/games/snake.cpp
new file mode 100644
index 0000000..40d5d96
--- /dev/null
+++ b/src/games/snake.cpp
@@ -0,0 +1,376 @@
+// snake.cpp - classic Nokia-style Snake for Bananarchy (Sxmo/dwm, 240x296)
+// Standalone X11 application in C++. Self-contained: uses a built-in 5x7
+// bitmap font so it has no font-file dependency.
+//
+// Controls (Nokia keypad + D-pad):
+//   2 / Up        -> turn up        8 / Down      -> turn down
+//   4 / Left       -> turn left      6 / Right     -> turn right
+//   5 / OK / Enter -> pause / restart (after game over)
+//   Back / Esc     -> quit
+//
+// Build: g++ -O2 snake.cpp -lX11 -o snake
+
+#include <X11/Xlib.h>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <ctime>
+#include <unistd.h>
+#include <sys/select.h>
+#include <sys/time.h>
+#include <X11/Xutil.h>
+#include <X11/keysym.h>
+#include <X11/Xatom.h>
+
+static const int WIN_W = 240;
+static const int WIN_H = 296;
+static const int COLS = 24;
+static const int ROWS = 28;
+
+// ---- 5x7 bitmap font (rows are 5-bit patterns, MSB = leftmost pixel) ----
+struct Glyph { char ch; unsigned char r[7]; };
+static const Glyph GLYPHS[] = {
+  {' ', {0,0,0,0,0,0,0}},
+  {'!', {0b00100,0b00100,0b00100,0b00100,0b00100,0,0b00100}},
+  {'.', {0,0,0,0,0,0b00100,0b00100}},
+  {'-', {0,0,0,0b11111,0,0,0}},
+  {':', {0,0b00100,0b00100,0,0b00100,0b00100,0}},
+  {'?', {0b01110,0b10001,0b00001,0b00110,0b00100,0,0b00100}},
+  {'A', {0b01110,0b10001,0b10001,0b11111,0b10001,0b10001,0b10001}},
+  {'B', {0b11110,0b10001,0b10001,0b11110,0b10001,0b10001,0b11110}},
+  {'C', {0b01110,0b10001,0b10000,0b10000,0b10000,0b10001,0b01110}},
+  {'D', {0b11110,0b10001,0b10001,0b10001,0b10001,0b10001,0b11110}},
+  {'E', {0b11111,0b10000,0b10000,0b11110,0b10000,0b10000,0b11111}},
+  {'F', {0b11111,0b10000,0b10000,0b11110,0b10000,0b10000,0b10000}},
+  {'G', {0b01110,0b10001,0b10000,0b10111,0b10001,0b10001,0b01111}},
+  {'H', {0b10001,0b10001,0b10001,0b11111,0b10001,0b10001,0b10001}},
+  {'I', {0b01110,0b00100,0b00100,0b00100,0b00100,0b00100,0b01110}},
+  {'K', {0b10001,0b10010,0b10100,0b11000,0b10100,0b10010,0b10001}},
+  {'L', {0b10000,0b10000,0b10000,0b10000,0b10000,0b10000,0b11111}},
+  {'M', {0b10001,0b11011,0b10101,0b10101,0b10001,0b10001,0b10001}},
+  {'N', {0b10001,0b10001,0b11001,0b10101,0b10011,0b10001,0b10001}},
+  {'O', {0b01110,0b10001,0b10001,0b10001,0b10001,0b10001,0b01110}},
+  {'P', {0b11110,0b10001,0b10001,0b11110,0b10000,0b10000,0b10000}},
+  {'R', {0b11110,0b10001,0b10001,0b11110,0b10100,0b10010,0b10001}},
+  {'S', {0b01111,0b10000,0b10000,0b01110,0b00001,0b00001,0b11110}},
+  {'T', {0b11111,0b00100,0b00100,0b00100,0b00100,0b00100,0b00100}},
+  {'V', {0b10001,0b10001,0b10001,0b10001,0b10001,0b01010,0b00100}},
+  {'W', {0b10001,0b10001,0b10001,0b10101,0b10101,0b11011,0b10001}},
+  {'Y', {0b10001,0b10001,0b01010,0b00100,0b00100,0b00100,0b00100}},
+  {'0', {0b01110,0b10011,0b10101,0b10101,0b11001,0b10001,0b01110}},
+  {'1', {0b00100,0b01100,0b00100,0b00100,0b00100,0b00100,0b01110}},
+  {'2', {0b01110,0b10001,0b00001,0b00110,0b01000,0b10000,0b11111}},
+  {'3', {0b11110,0b00001,0b00001,0b01110,0b00001,0b00001,0b11110}},
+  {'4', {0b00010,0b00110,0b01010,0b10010,0b11111,0b00010,0b00010}},
+  {'5', {0b11111,0b10000,0b11110,0b00001,0b00001,0b10001,0b01110}},
+  {'6', {0b00110,0b01000,0b10000,0b11110,0b10001,0b10001,0b01110}},
+  {'7', {0b11111,0b00001,0b00010,0b00100,0b01000,0b01000,0b01000}},
+  {'8', {0b01110,0b10001,0b10001,0b01110,0b10001,0b10001,0b01110}},
+  {'9', {0b01110,0b10001,0b10001,0b01111,0b00001,0b00010,0b01100}},
+};
+static const int NGLYPH = int(sizeof(GLYPHS) / sizeof(GLYPHS[0]));
+
+static const unsigned char* glyph(char c) {
+  for (int i = 0; i < NGLYPH; i++)
+    if (GLYPHS[i].ch == c) return GLYPHS[i].r;
+  return GLYPHS[0].r; // space
+}
+
+// ---- X11 state ----
+static Display* dpy = nullptr;
+static Window win;
+static GC gc;
+static Pixmap back;
+static int screen;
+static int winW = WIN_W, winH = WIN_H;
+static int cell, gx0, gy0, gw, gh;
+
+// ---- colors (Nokia green monochrome) ----
+static unsigned long C_BG, C_FG, C_HEAD, C_FOOD, C_DIM;
+
+// ---- game state ----
+enum State { PLAYING, PAUSED, GAMEOVER };
+static State state = PLAYING;
+static int snake[COLS * ROWS][2]; // x,y per segment (0 = tail)
+static int snakelen = 4;
+static int dirx = 1, diry = 0;     // current direction
+static int ndirx = 1, ndiry = 0;   // buffered next direction
+static int foodx, foody;
+static int score = 0;
+static int best = 0;
+static int speed = 130;            // ms per step (speeds up with score)
+static unsigned long nextTick = 0;
+static bool running = true;
+static unsigned long now_ms() {
+  struct timeval tv;
+  gettimeofday(&tv, nullptr);
+  return (unsigned long)(tv.tv_sec * 1000 + tv.tv_usec / 1000);
+}
+
+static void compute_grid() {
+  int m = 4;
+  int aw = winW - 2 * m;
+  int ah = winH - 2 * m;
+  cell = aw / COLS;
+  if ((ah / ROWS) < cell) cell = ah / ROWS;
+  if (cell < 4) cell = 4;
+  gw = cell * COLS;
+  gh = cell * ROWS;
+  gx0 = (winW - gw) / 2;
+  gy0 = (winH - gh) / 2;
+}
+
+static void place_food() {
+  bool occ[COLS * ROWS];
+  for (int i = 0; i < COLS * ROWS; i++) occ[i] = false;
+  for (int i = 0; i < snakelen; i++) occ[snake[i][0] + snake[i][1] * COLS] = true;
+  int freecnt = 0;
+  for (int i = 0; i < COLS * ROWS; i++) if (!occ[i]) freecnt++;
+  if (freecnt == 0) { foodx = -1; foody = -1; return; }
+  int pick = (int)(rand() % freecnt);
+  int idx = 0;
+  for (int i = 0; i < COLS * ROWS; i++) {
+    if (!occ[i]) {
+      if (idx == pick) { foodx = i % COLS; foody = i / COLS; return; }
+      idx++;
+    }
+  }
+}
+
+static void reset_game() {
+  snakelen = 4;
+  int cx = COLS / 2, cy = ROWS / 2;
+  for (int i = 0; i < snakelen; i++) {
+    snake[i][0] = cx - i; // tail to the left, head at cx
+    snake[i][1] = cy;
+  }
+  dirx = 1; diry = 0;
+  ndirx = 1; ndiry = 0;
+  score = 0;
+  speed = 130;
+  place_food();
+  state = PLAYING;
+  nextTick = now_ms() + speed;
+}
+
+static void step() {
+  // apply buffered direction (no reversing)
+  if (!(ndirx == -dirx && ndiry == -diry) && !(ndirx == 0 && ndiry == 0)) {
+    dirx = ndirx; diry = ndiry;
+  }
+  int hx = snake[snakelen - 1][0] + dirx;
+  int hy = snake[snakelen - 1][1] + diry;
+  if (hx < 0 || hx >= COLS || hy < 0 || hy >= ROWS) { state = GAMEOVER; return; }
+  // self collision (ignore current tail cell since it will move, unless growing)
+  for (int i = 0; i < snakelen - 1; i++) {
+    if (snake[i][0] == hx && snake[i][1] == hy) { state = GAMEOVER; return; }
+  }
+  bool ate = (hx == foodx && hy == foody);
+  if (!ate) {
+    // shift body toward tail
+    for (int i = 0; i < snakelen - 1; i++) {
+      snake[i][0] = snake[i + 1][0];
+      snake[i][1] = snake[i + 1][1];
+    }
+  } else {
+    if (snakelen < COLS * ROWS) snakelen++;
+  }
+  snake[snakelen - 1][0] = hx;
+  snake[snakelen - 1][1] = hy;
+  if (ate) {
+    score += 10;
+    if (score > best) best = score;
+    int ns = 130 - (score / 50) * 8;
+    if (ns < 60) ns = 60;
+    speed = ns;
+    place_food();
+  }
+  nextTick = now_ms() + speed;
+}
+
+static void draw_text(int x, int y, int scale, unsigned long col, const char* s) {
+  int cx = x;
+  for (const char* p = s; *p; p++) {
+    const unsigned char* g = glyph(*p);
+    for (int r = 0; r < 7; r++) {
+      unsigned char row = g[r];
+      for (int b = 0; b < 5; b++) {
+        if (row & (1 << (4 - b))) {
+          XSetForeground(dpy, gc, col);
+          XFillRectangle(dpy, back, gc, cx + b * scale, y + r * scale, scale, scale);
+        }
+      }
+    }
+    cx += 6 * scale;
+  }
+}
+
+static void render() {
+  XSetForeground(dpy, gc, C_BG);
+  XFillRectangle(dpy, back, gc, 0, 0, winW, winH);
+
+  // playfield border
+  XSetForeground(dpy, gc, C_DIM);
+  XDrawRectangle(dpy, back, gc, gx0 - 1, gy0 - 1, gw + 2, gh + 2);
+
+  // food
+  if (foodx >= 0) {
+    XSetForeground(dpy, gc, C_FOOD);
+    XFillRectangle(dpy, back, gc, gx0 + foodx * cell, gy0 + foody * cell, cell, cell);
+  }
+  // snake
+  for (int i = 0; i < snakelen; i++) {
+    XSetForeground(dpy, gc, (i == snakelen - 1) ? C_HEAD : C_FG);
+    XFillRectangle(dpy, back, gc, gx0 + snake[i][0] * cell, gy0 + snake[i][1] * cell, cell, cell);
+  }
+
+  // score (top-left, small)
+  char buf[32];
+  snprintf(buf, sizeof(buf), "SCORE %d", score);
+  draw_text(gx0, 2, 1, C_DIM, buf);
+  if (best > 0) {
+    snprintf(buf, sizeof(buf), "BEST %d", best);
+    draw_text(gx0 + gw - 11 * 6, 2, 1, C_DIM, buf);
+  }
+
+  if (state == PAUSED) {
+    draw_text(winW / 2 - 3 * 6 * 2, winH / 2 - 7 * 2, 2, C_FG, "PAUSE");
+    draw_text(winW / 2 - 5 * 6, winH / 2 + 7 * 2, 1, C_DIM, "5 RESUME");
+  } else if (state == GAMEOVER) {
+    draw_text(winW / 2 - 4 * 6 * 2, winH / 2 - 14, 2, C_FG, "GAME OVER");
+    snprintf(buf, sizeof(buf), "SCORE %d", score);
+    draw_text(winW / 2 - 5 * 6, winH / 2 + 4, 1, C_DIM, buf);
+    draw_text(winW / 2 - 9 * 6, winH / 2 + 4 + 9, 1, C_DIM, "5 NEW GAME");
+  }
+
+  XCopyArea(dpy, back, win, gc, 0, 0, winW, winH, 0, 0);
+  XFlush(dpy);
+}
+
+static void handle_key(KeySym ks) {
+  switch (ks) {
+    case XK_Up: case XK_w: case XK_KP_Up: case XK_2:
+      ndirx = 0; ndiry = -1; break;
+    case XK_Down: case XK_s: case XK_KP_Down: case XK_8: case XK_x:
+      ndirx = 0; ndiry = 1; break;
+    case XK_Left: case XK_a: case XK_KP_Left: case XK_4:
+      ndirx = -1; ndiry = 0; break;
+    case XK_Right: case XK_d: case XK_KP_Right: case XK_6:
+      ndirx = 1; ndiry = 0; break;
+    case XK_5: case XK_Return: case XK_KP_Enter: case XK_space: case XK_p:
+      if (state == PLAYING) state = PAUSED;
+      else if (state == PAUSED) { state = PLAYING; nextTick = now_ms() + speed; }
+      else if (state == GAMEOVER) reset_game();
+      break;
+    case XK_Escape: case XK_BackSpace: case XK_Delete: case XK_End:
+    case XK_Menu:
+      // quit is handled by the caller via a flag
+      running = false;
+      break;
+    default:
+      if (state == GAMEOVER) reset_game();
+      break;
+  }
+}
+
+static void setup_window() {
+  dpy = XOpenDisplay(nullptr);
+  if (!dpy) { fprintf(stderr, "snake: cannot open display\n"); exit(1); }
+  screen = DefaultScreen(dpy);
+  win = XCreateWindow(dpy, RootWindow(dpy, screen), 0, 0, winW, winH, 0,
+                       CopyFromParent, InputOutput, CopyFromParent, 0, nullptr);
+  XStoreName(dpy, win, "Snake");
+  XClassHint* ch = XAllocClassHint();
+  if (ch) { ch->res_name = (char*)"snake"; ch->res_class = (char*)"snake"; XSetClassHint(dpy, win, ch); XFree(ch); }
+
+  // float as a dialog so dwm doesn't tile it
+  Atom wtype = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
+  Atom dialog = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
+  XChangeProperty(dpy, win, wtype, XA_ATOM, 32, PropModeReplace, (unsigned char*)&dialog, 1);
+
+  // fixed size hints
+  XSizeHints sh;
+  sh.flags = PMinSize | PMaxSize | PSize;
+  sh.min_width = sh.max_width = winW;
+  sh.min_height = sh.max_height = winH;
+  XSetWMNormalHints(dpy, win, &sh);
+
+  Atom wm_del = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
+  XSetWMProtocols(dpy, win, &wm_del, 1);
+
+  gc = XCreateGC(dpy, win, 0, nullptr);
+  back = XCreatePixmap(dpy, win, winW, winH, DefaultDepth(dpy, screen));
+
+  C_BG = BlackPixel(dpy, screen);
+  // Nokia green monochrome
+  C_FG = 0x33ff33;
+  C_HEAD = 0x99ff99;
+  C_FOOD = 0x66ff66;
+  C_DIM = 0x0a3a0a;
+
+  XSelectInput(dpy, win, KeyPressMask | StructureNotifyMask | ExposureMask);
+  XMapWindow(dpy, win);
+  compute_grid();
+}
+
+static void handle_event(XEvent& e) {
+  if (e.type == ClientMessage) {
+    Atom wm_del = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
+    if ((Atom)e.xclient.data.l[0] == wm_del) running = false;
+  } else if (e.type == ConfigureNotify) {
+    if (e.xconfigure.width != winW || e.xconfigure.height != winH) {
+      winW = e.xconfigure.width; winH = e.xconfigure.height;
+      compute_grid();
+    }
+  } else if (e.type == Expose) {
+    render();
+  } else if (e.type == KeyPress) {
+    char buf[8];
+    KeySym ks = 0;
+    XLookupString(&e.xkey, buf, sizeof(buf), &ks, nullptr);
+    if (ks == NoSymbol) ks = XLookupKeysym(&e.xkey, 0);
+    if (ks == XK_q) { running = false; return; }
+    handle_key(ks);
+  }
+}
+
+int main() {
+  srand((unsigned)time(nullptr) ^ (unsigned)getpid());
+  setup_window();
+  reset_game();
+  render();
+
+  int xfd = ConnectionNumber(dpy);
+  while (running) {
+    long until = (long)nextTick - (long)now_ms();
+    if (until < 0) until = 0;
+    struct timeval tv;
+    tv.tv_sec = until / 1000;
+    tv.tv_usec = (until % 1000) * 1000;
+    fd_set fds;
+    FD_ZERO(&fds);
+    FD_SET(xfd, &fds);
+    int r = select(xfd + 1, &fds, nullptr, nullptr, &tv);
+    if (r > 0) {
+      XEvent e;
+      while (XPending(dpy)) {
+        XNextEvent(dpy, &e);
+        handle_event(e);
+        if (!running) break;
+      }
+      if (!running) break;
+    }
+    if (running && now_ms() >= nextTick) {
+      if (state == PLAYING) step();
+      if (state == PLAYING) nextTick = now_ms() + speed;
+      else nextTick = now_ms() + 80; // keep loop responsive while paused/over
+      render();
+    }
+  }
+
+  XFreeGC(dpy, gc);
+  XFreePixmap(dpy, back);
+  XDestroyWindow(dpy, win);
+  XCloseDisplay(dpy);
+  return 0;
+}
diff --git a/src/games/tetris.cpp b/src/games/tetris.cpp
new file mode 100644
index 0000000..51c62ab
--- /dev/null
+++ b/src/games/tetris.cpp
@@ -0,0 +1,454 @@
+// tetris.cpp - Tetris for Bananarchy (Sxmo/dwm, 240x296)
+// Standalone X11 application in C++. Self-contained: uses a built-in 5x7
+// bitmap font so it has no font-file dependency.
+//
+// Controls (Nokia keypad + D-pad):
+//   4 / Left        -> move left       6 / Right     -> move right
+//   2 / Up           -> rotate CW        8 / Down      -> soft drop
+//   0 / Space        -> hard drop        # / * / P     -> pause
+//   5 / OK            -> resume / new game
+//   Back / Esc       -> quit
+//
+// Build: g++ -O2 tetris.cpp -lX11 -o tetris
+
+#include <X11/Xlib.h>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <ctime>
+#include <unistd.h>
+#include <sys/select.h>
+#include <sys/time.h>
+#include <X11/Xutil.h>
+#include <X11/keysym.h>
+#include <X11/Xatom.h>
+
+static const int WIN_W = 240;
+static const int WIN_H = 296;
+static const int PCOLS = 10;
+static const int PROWS = 20;
+static const int CELL = 10;
+
+// ---- 5x7 bitmap font ----
+struct Glyph { char ch; unsigned char r[7]; };
+static const Glyph GLYPHS[] = {
+  {' ', {0,0,0,0,0,0,0}},
+  {'!', {0b00100,0b00100,0b00100,0b00100,0b00100,0,0b00100}},
+  {'.', {0,0,0,0,0,0b00100,0b00100}},
+  {'-', {0,0,0,0b11111,0,0,0}},
+  {':', {0,0b00100,0b00100,0,0b00100,0b00100,0}},
+  {'?', {0b01110,0b10001,0b00001,0b00110,0b00100,0,0b00100}},
+  {'A', {0b01110,0b10001,0b10001,0b11111,0b10001,0b10001,0b10001}},
+  {'B', {0b11110,0b10001,0b10001,0b11110,0b10001,0b10001,0b11110}},
+  {'C', {0b01110,0b10001,0b10000,0b10000,0b10000,0b10001,0b01110}},
+  {'E', {0b11111,0b10000,0b10000,0b11110,0b10000,0b10000,0b11111}},
+  {'F', {0b11111,0b10000,0b10000,0b11110,0b10000,0b10000,0b10000}},
+  {'G', {0b01110,0b10001,0b10000,0b10111,0b10001,0b10001,0b01111}},
+  {'I', {0b01110,0b00100,0b00100,0b00100,0b00100,0b00100,0b01110}},
+  {'L', {0b10000,0b10000,0b10000,0b10000,0b10000,0b10000,0b11111}},
+  {'M', {0b10001,0b11011,0b10101,0b10101,0b10001,0b10001,0b10001}},
+  {'N', {0b10001,0b10001,0b11001,0b10101,0b10011,0b10001,0b10001}},
+  {'O', {0b01110,0b10001,0b10001,0b10001,0b10001,0b10001,0b01110}},
+  {'P', {0b11110,0b10001,0b10001,0b11110,0b10000,0b10000,0b10000}},
+  {'R', {0b11110,0b10001,0b10001,0b11110,0b10100,0b10010,0b10001}},
+  {'S', {0b01111,0b10000,0b10000,0b01110,0b00001,0b00001,0b11110}},
+  {'T', {0b11111,0b00100,0b00100,0b00100,0b00100,0b00100,0b00100}},
+  {'V', {0b10001,0b10001,0b10001,0b10001,0b10001,0b01010,0b00100}},
+  {'X', {0b10001,0b10001,0b01010,0b00100,0b01010,0b10001,0b10001}},
+  {'Y', {0b10001,0b10001,0b01010,0b00100,0b00100,0b00100,0b00100}},
+  {'0', {0b01110,0b10011,0b10101,0b10101,0b11001,0b10001,0b01110}},
+  {'1', {0b00100,0b01100,0b00100,0b00100,0b00100,0b00100,0b01110}},
+  {'2', {0b01110,0b10001,0b00001,0b00110,0b01000,0b10000,0b11111}},
+  {'3', {0b11110,0b00001,0b00001,0b01110,0b00001,0b00001,0b11110}},
+  {'4', {0b00010,0b00110,0b01010,0b10010,0b11111,0b00010,0b00010}},
+  {'5', {0b11111,0b10000,0b11110,0b00001,0b00001,0b10001,0b01110}},
+  {'6', {0b00110,0b01000,0b10000,0b11110,0b10001,0b10001,0b01110}},
+  {'7', {0b11111,0b00001,0b00010,0b00100,0b01000,0b01000,0b01000}},
+  {'8', {0b01110,0b10001,0b10001,0b01110,0b10001,0b10001,0b01110}},
+  {'9', {0b01110,0b10001,0b10001,0b01111,0b00001,0b00010,0b01100}},
+};
+static const int NGLYPH = int(sizeof(GLYPHS) / sizeof(GLYPHS[0]));
+static const unsigned char* glyph(char c) {
+  for (int i = 0; i < NGLYPH; i++)
+    if (GLYPHS[i].ch == c) return GLYPHS[i].r;
+  return GLYPHS[0].r;
+}
+
+// ---- X11 state ----
+static Display* dpy = nullptr;
+static Window win;
+static GC gc;
+static Pixmap back;
+static int screen;
+static int winW = WIN_W, winH = WIN_H;
+static unsigned long C_BG, C_FG, C_HEAD, C_FOOD, C_DIM;
+
+// ---- tetromino definitions (state 0 within a 4x4 box) ----
+// type 0..6 -> I,O,T,S,Z,J,L
+static const int BASE[7][4][2] = {
+  {{0,1},{1,1},{2,1},{3,1}}, // I
+  {{1,0},{2,0},{1,1},{2,1}}, // O
+  {{1,0},{0,1},{1,1},{2,1}}, // T
+  {{1,0},{2,0},{0,1},{1,1}}, // S
+  {{0,0},{1,0},{1,1},{2,1}}, // Z
+  {{0,0},{0,1},{1,1},{2,1}}, // J
+  {{2,0},{0,1},{1,1},{2,1}}, // L
+};
+
+enum State { PLAYING, PAUSED, GAMEOVER };
+static State state = PLAYING;
+static int board[PCOLS][PROWS]; // 0 empty, else type+1
+static int curType = 0, curRot = 0, curX = 3, curY = 0;
+static int nextType = 0;
+static int score = 0, best = 0, lines = 0, level = 1;
+static int speed = 600; // ms per gravity step
+static unsigned long nextTick = 0;
+static bool running = true;
+
+static void rotate_cells(const int src[4][2], int dst[4][2], int times) {
+  for (int i = 0; i < 4; i++) {
+    int x = src[i][0], y = src[i][1];
+    for (int t = 0; t < times; t++) { int nx = 3 - y; int ny = x; x = nx; y = ny; }
+    dst[i][0] = x; dst[i][1] = y;
+  }
+}
+
+static void piece_cells(int type, int rot, int out[4][2]) {
+  rotate_cells(BASE[type], out, ((rot % 4) + 4) % 4);
+}
+
+static bool collide(int px, int py, int cells[4][2]) {
+  for (int i = 0; i < 4; i++) {
+    int cx = px + cells[i][0];
+    int cy = py + cells[i][1];
+    if (cx < 0 || cx >= PCOLS || cy >= PROWS) return true;
+    if (cy >= 0 && board[cx][cy]) return true;
+  }
+  return false;
+}
+
+static unsigned long now_ms() {
+  struct timeval tv;
+  gettimeofday(&tv, nullptr);
+  return (unsigned long)(tv.tv_sec * 1000 + tv.tv_usec / 1000);
+}
+
+static void spawn() {
+  curType = nextType;
+  nextType = rand() % 7;
+  curRot = 0;
+  curX = 3;
+  curY = 0;
+  int cells[4][2];
+  piece_cells(curType, curRot, cells);
+  if (collide(curX, curY, cells)) {
+    state = GAMEOVER;
+    if (score > best) best = score;
+  }
+  nextTick = now_ms() + speed;
+}
+
+static void lock_piece() {
+  int cells[4][2];
+  piece_cells(curType, curRot, cells);
+  for (int i = 0; i < 4; i++) {
+    int cx = curX + cells[i][0];
+    int cy = curY + cells[i][1];
+    if (cy < 0) { state = GAMEOVER; if (score > best) best = score; return; }
+    board[cx][cy] = curType + 1;
+  }
+  // clear full lines
+  int cleared = 0;
+  for (int y = PROWS - 1; y >= 0; y--) {
+    bool full = true;
+    for (int x = 0; x < PCOLS; x++) if (!board[x][y]) { full = false; break; }
+    if (full) {
+      cleared++;
+      for (int yy = y; yy > 0; yy--)
+        for (int x = 0; x < PCOLS; x++) board[x][yy] = board[x][yy - 1];
+      for (int x = 0; x < PCOLS; x++) board[x][0] = 0;
+      y++; // recheck same row
+    }
+  }
+  if (cleared > 0) {
+    lines += cleared;
+    int pts[5] = {0, 100, 300, 500, 800};
+    score += pts[cleared] * level;
+    if (score > best) best = score;
+    int nl = 1 + lines / 10;
+    if (nl != level) { level = nl; speed = 600 - (level - 1) * 50; if (speed < 120) speed = 120; }
+  }
+  spawn();
+}
+
+static void step() {
+  int cells[4][2];
+  piece_cells(curType, curRot, cells);
+  if (!collide(curX, curY + 1, cells)) {
+    curY++;
+  } else {
+    lock_piece();
+  }
+}
+
+static void hard_drop() {
+  int cells[4][2];
+  piece_cells(curType, curRot, cells);
+  while (!collide(curX, curY + 1, cells)) curY++;
+  score += 2;
+  if (score > best) best = score;
+  lock_piece();
+}
+
+static void try_move(int dx) {
+  int cells[4][2];
+  piece_cells(curType, curRot, cells);
+  if (!collide(curX + dx, curY, cells)) curX += dx;
+}
+
+static void try_rotate() {
+  int cells[4][2];
+  piece_cells(curType, (curRot + 1) % 4, cells);
+  // simple wall kick: try shift left/right if blocked
+  if (!collide(curX, curY, cells)) { curRot = (curRot + 1) % 4; return; }
+  if (!collide(curX - 1, curY, cells)) { curX--; curRot = (curRot + 1) % 4; return; }
+  if (!collide(curX + 1, curY, cells)) { curX++; curRot = (curRot + 1) % 4; return; }
+  if (!collide(curX - 2, curY, cells)) { curX -= 2; curRot = (curRot + 1) % 4; return; }
+  if (!collide(curX + 2, curY, cells)) { curX += 2; curRot = (curRot + 1) % 4; return; }
+}
+
+static void reset_game() {
+  for (int x = 0; x < PCOLS; x++) for (int y = 0; y < PROWS; y++) board[x][y] = 0;
+  score = 0; lines = 0; level = 1; speed = 600;
+  nextType = rand() % 7;
+  spawn();
+  state = PLAYING;
+}
+
+static void draw_text(int x, int y, int scale, unsigned long col, const char* s) {
+  int cx = x;
+  for (const char* p = s; *p; p++) {
+    const unsigned char* g = glyph(*p);
+    for (int r = 0; r < 7; r++) {
+      unsigned char row = g[r];
+      for (int b = 0; b < 5; b++)
+        if (row & (1 << (4 - b))) {
+          XSetForeground(dpy, gc, col);
+          XFillRectangle(dpy, back, gc, cx + b * scale, y + r * scale, scale, scale);
+        }
+    }
+    cx += 6 * scale;
+  }
+}
+
+static void render() {
+  int px0 = 8, py0 = 8;
+  XSetForeground(dpy, gc, C_BG);
+  XFillRectangle(dpy, back, gc, 0, 0, winW, winH);
+
+  // playfield border
+  XSetForeground(dpy, gc, C_DIM);
+  XDrawRectangle(dpy, back, gc, px0 - 1, py0 - 1, PCOLS * CELL + 2, PROWS * CELL + 2);
+
+  // settled blocks
+  for (int x = 0; x < PCOLS; x++)
+    for (int y = 0; y < PROWS; y++)
+      if (board[x][y]) {
+        XSetForeground(dpy, gc, C_FG);
+        XFillRectangle(dpy, back, gc, px0 + x * CELL, py0 + y * CELL, CELL, CELL);
+      }
+
+  // active piece
+  if (state == PLAYING) {
+    int cells[4][2];
+    piece_cells(curType, curRot, cells);
+    XSetForeground(dpy, gc, C_HEAD);
+    for (int i = 0; i < 4; i++) {
+      int cx = curX + cells[i][0];
+      int cy = curY + cells[i][1];
+      if (cy >= 0)
+        XFillRectangle(dpy, back, gc, px0 + cx * CELL, py0 + cy * CELL, CELL, CELL);
+    }
+  }
+
+  // side panel
+  int sx = px0 + PCOLS * CELL + 12;
+  draw_text(sx, py0, 1, C_DIM, "NEXT");
+  int nc[4][2];
+  piece_cells(nextType, 0, nc);
+  int minx = 4, miny = 4, maxx = -1, maxy = -1;
+  for (int i = 0; i < 4; i++) {
+    minx = nc[i][0] < minx ? nc[i][0] : minx;
+    miny = nc[i][1] < miny ? nc[i][1] : miny;
+    maxx = nc[i][0] > maxx ? nc[i][0] : maxx;
+    maxy = nc[i][1] > maxy ? nc[i][1] : maxy;
+  }
+  int pcell = 6;
+  int nx0 = sx + 2, ny0 = py0 + 10;
+  XSetForeground(dpy, gc, C_HEAD);
+  for (int i = 0; i < 4; i++) {
+    int cx = nx0 + (nc[i][0] - minx) * pcell;
+    int cy = ny0 + (nc[i][1] - miny) * pcell;
+    XFillRectangle(dpy, back, gc, cx, cy, pcell, pcell);
+  }
+  int ty = py0 + 60;
+  char buf[32];
+  snprintf(buf, sizeof(buf), "SCORE %d", score); draw_text(sx, ty, 1, C_DIM, buf);
+  snprintf(buf, sizeof(buf), "LINES %d", lines); draw_text(sx, ty + 9, 1, C_DIM, buf);
+  snprintf(buf, sizeof(buf), "LEVEL %d", level); draw_text(sx, ty + 18, 1, C_DIM, buf);
+  if (best > 0) { snprintf(buf, sizeof(buf), "BEST %d", best); draw_text(sx, ty + 27, 1, C_DIM, buf); }
+
+  if (state == PAUSED) {
+    draw_text(winW / 2 - 3 * 6 * 2, winH / 2 - 7, 2, C_FG, "PAUSE");
+    draw_text(winW / 2 - 5 * 6, winH / 2 + 10, 1, C_DIM, "5 RESUME");
+  } else if (state == GAMEOVER) {
+    draw_text(winW / 2 - 5 * 6 * 2, winH / 2 - 14, 2, C_FG, "GAME OVER");
+    snprintf(buf, sizeof(buf), "SCORE %d", score); draw_text(winW / 2 - 5 * 6, winH / 2 + 4, 1, C_DIM, buf);
+    draw_text(winW / 2 - 9 * 6, winH / 2 + 13, 1, C_DIM, "5 NEW GAME");
+  }
+
+  XCopyArea(dpy, back, win, gc, 0, 0, winW, winH, 0, 0);
+  XFlush(dpy);
+}
+
+static void setup_window() {
+  dpy = XOpenDisplay(nullptr);
+  if (!dpy) { fprintf(stderr, "tetris: cannot open display\n"); exit(1); }
+  screen = DefaultScreen(dpy);
+  win = XCreateWindow(dpy, RootWindow(dpy, screen), 0, 0, winW, winH, 0,
+                       CopyFromParent, InputOutput, CopyFromParent, 0, nullptr);
+  XStoreName(dpy, win, "Tetris");
+  XClassHint* ch = XAllocClassHint();
+  if (ch) { ch->res_name = (char*)"tetris"; ch->res_class = (char*)"tetris"; XSetClassHint(dpy, win, ch); XFree(ch); }
+
+  Atom wtype = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
+  Atom dialog = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
+  XChangeProperty(dpy, win, wtype, XA_ATOM, 32, PropModeReplace, (unsigned char*)&dialog, 1);
+
+  XSizeHints sh;
+  sh.flags = PMinSize | PMaxSize | PSize;
+  sh.min_width = sh.max_width = winW;
+  sh.min_height = sh.max_height = winH;
+  XSetWMNormalHints(dpy, win, &sh);
+
+  Atom wm_del = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
+  XSetWMProtocols(dpy, win, &wm_del, 1);
+
+  gc = XCreateGC(dpy, win, 0, nullptr);
+  back = XCreatePixmap(dpy, win, winW, winH, DefaultDepth(dpy, screen));
+
+  C_BG = BlackPixel(dpy, screen);
+  C_FG = 0x33ff33;
+  C_HEAD = 0x99ff99;
+  C_FOOD = 0x66ff66;
+  C_DIM = 0x0a3a0a;
+
+  XSelectInput(dpy, win, KeyPressMask | StructureNotifyMask | ExposureMask);
+  XMapWindow(dpy, win);
+}
+
+static void handle_key(KeySym ks) {
+  switch (ks) {
+    case XK_Left: case XK_a: case XK_KP_Left: case XK_4:
+      if (state == PLAYING) { try_move(-1); }
+      break;
+    case XK_Right: case XK_d: case XK_KP_Right: case XK_6:
+      if (state == PLAYING) { try_move(1); }
+      break;
+    case XK_Up: case XK_w: case XK_KP_Up: case XK_2:
+      if (state == PLAYING) { try_rotate(); }
+      break;
+    case XK_Down: case XK_s: case XK_KP_Down: case XK_8: case XK_x:
+      if (state == PLAYING) {
+        int cells[4][2];
+        piece_cells(curType, curRot, cells);
+        if (!collide(curX, curY + 1, cells)) {
+          curY++; score += 1; if (score > best) best = score;
+        } else {
+          lock_piece();
+        }
+        nextTick = now_ms() + speed;
+      }
+      break;
+    case XK_space: case XK_0:
+      if (state == PLAYING) { hard_drop(); }
+      break;
+    case XK_p: case XK_3: case XK_numbersign: case XK_asterisk:
+      if (state == PLAYING) {
+        state = PAUSED;
+      } else if (state == PAUSED) {
+        state = PLAYING; nextTick = now_ms() + speed;
+      }
+      break;
+    case XK_5: case XK_Return: case XK_KP_Enter:
+      if (state == PAUSED) {
+        state = PLAYING; nextTick = now_ms() + speed;
+      } else if (state == GAMEOVER) {
+        reset_game();
+      }
+      break;
+    case XK_Escape: case XK_BackSpace: case XK_Delete: case XK_End: case XK_Menu:
+      running = false; break;
+    default:
+      if (state == GAMEOVER) { reset_game(); }
+      break;
+  }
+}
+
+static void handle_event(XEvent& e) {
+  if (e.type == ClientMessage) {
+    Atom wm_del = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
+    if ((Atom)e.xclient.data.l[0] == wm_del) running = false;
+  } else if (e.type == ConfigureNotify) {
+    winW = e.xconfigure.width; winH = e.xconfigure.height;
+  } else if (e.type == Expose) {
+    render();
+  } else if (e.type == KeyPress) {
+    char buf[8];
+    KeySym ks = 0;
+    XLookupString(&e.xkey, buf, sizeof(buf), &ks, nullptr);
+    if (ks == NoSymbol) ks = XLookupKeysym(&e.xkey, 0);
+    if (ks == XK_q) { running = false; return; }
+    handle_key(ks);
+  }
+}
+
+int main() {
+  srand((unsigned)time(nullptr) ^ (unsigned)getpid());
+  setup_window();
+  reset_game();
+  render();
+
+  int xfd = ConnectionNumber(dpy);
+  while (running) {
+    long until = (long)nextTick - (long)now_ms();
+    if (until < 0) until = 0;
+    struct timeval tv;
+    tv.tv_sec = until / 1000;
+    tv.tv_usec = (until % 1000) * 1000;
+    fd_set fds;
+    FD_ZERO(&fds);
+    FD_SET(xfd, &fds);
+    int r = select(xfd + 1, &fds, nullptr, nullptr, &tv);
+    if (r > 0) {
+      XEvent e;
+      while (XPending(dpy)) {
+        XNextEvent(dpy, &e);
+        handle_event(e);
+        if (!running) break;
+      }
+      if (!running) break;
+    }
+    if (running && now_ms() >= nextTick) {
+      if (state == PLAYING) step();
+      else nextTick = now_ms() + 80;
+      render();
+    }
+  }
+
+  XFreeGC(dpy, gc);
+  XFreePixmap(dpy, back);
+  XDestroyWindow(dpy, win);
+  XCloseDisplay(dpy);
+  return 0;
+}