Theme tune
This tune is played after the title screen has been prepared (see 862F).
In-game tune
This tune is played by the main loop while a game is in progress (see 883A).
Air supply
This sound effect is produced while the air supply in the current cavern is being drained before moving to the next cavern (see 90B4).
Escape
This sound effect is produced when Willy escapes from the mine (see 9077).
Lose a life
This sound effect is produced when Willy loses a life (see 8908).
Game over
This sound effect is produced by the routine at 8944 during the game over sequence.
Jumping
These sound effects are produced by the routine at 8ABB when Willy is jumping.
Falling
These sound effects are produced when Willy is falling (see 8B59).