Theme tune
This tune is played after the title screen has been prepared (see 34984).
In-game tune
This tune is played by the main loop while a game is in progress (see 35644).
Title screen screech
This sound effect is produced after the theme tune has finished playing, and repeats until the 'Press ENTER to Start' message has finished scrolling across the screen (see 34993).
Item
This sound effect is produced by the routine at 37841 when Willy collects an item.
Arrow
This sound effect is produced when an arrow is fired (see 37431).
Lose a life
This sound effect is produced by the routine at 35841 when Willy loses a life.
Game over
This sound effect is produced by the routine at 35914 during the game over sequence.
Jumping
These sound effects are produced by the routine at 36307 when Willy is jumping.
Falling
These sound effects are produced when Willy is falling (see 36458).