Esc to deselect tower
Left and right brackets to change map size (will reset game!)
Mouse to place a tower
Spacebar to pause
0-9 to select a tower to place
F to toggle FPS display
G to toggle god mode
H to toggle displaying enemy health bars
M to import and load map string (will reset game!)
P to toggle display particle effects (turning them off helps with lag)
Q to toggle towers firing
R to reset game
S to sell selected tower
U to upgrade selected tower
V to mute sound volume
W to toggle delay between waves
X to export map string (copies to clipboard)
Z to return to default zoom level (will reset game!)