- Font: add missing glyphs (U, W and complete A-Z) to both Snake and
Tetris 5x7 bitmap fonts so PAUSE/RESUME/NEW GAME render correctly.
- Tetris: the gravity loop never advanced nextTick after a step, so the
piece dropped almost instantly every frame. Advance nextTick by speed
after each step (matching Snake) so gravity honours the configured rate.
- Both: draw a 1px frame around the whole 240x296 window (right/bottom
edges were previously absent) and clear the playfield to black behind
PAUSE/GAME OVER text for contrast.
- Both: fix centering of overlay labels (GAME OVER, 5 RESUME, 5 NEW GAME).
Luxferre
6bf4139263