What's the objective? Don't die. Kill everything.

W: move up
A: move left
S: move down
D: move right

T: toggle timer

O: toggle step mode
N: next frame in step mode

P: toggle pause mode

C: toggle clear
B: toggle box
U: toggle undo box
F: toggle flip flop
R: toggle render

H: toggle show collision volume
K: no clip


M: mute