(see picture) and press the Space bar. This will let you change the keyboard controls.
Default Key Controls
The default key controls are:
Action - Space bar
Walk Forward - Up
Walk Backward - Down
Turn Left - Left
Turn Right - Right
Swing Down - Command
Swing Up - Option
Swing Low - Control
Pause - Escape
Change Camera Mode - Tab
Swivel Camera Left - ,
Swivel Camera Right - .
Zoom in - 1
Zoom out - 2
Other Keys
Increase Screen Size - F1
Decrease Screen Size - F2
Toggle Music - Command-M
Note
When you configure keys, your screen will flash and return to the Finder background. This is normal, and the game will reappear once your keys are defined.