Menu navigation:

• WASD or ↑←↓→ to select
• ENTER to confirm, ESC to back out

Game controls:

• WASD or ↑←↓→ to move/rotate tetrads
• Mouse to move pong paddles (works best in fullscreen)

Notes:

• To save loading time, much of the original game's music is missing.
• Key mapping looks weird, and preferences / high scores don't save.