Use these keys (some have more than one alternative):

Movement Key
Forward Up arrow, 8
Backward Down arrow, 2
Turn left Left arrow, 4
Turn right Right arrow, 6
Pitch down (Dive!) W
Pitch up (Pull up!) S
Roll left A
Roll right D
Slide left Q, 7
Slide right E, 9
Last movement againMouse click

NOTE: You may have to click once on the applet panel before the keys will work. (This tells Netscape to send the keys to the applet).