Zoom out to see more of the map at once
I recommend zooming out to about 50% or 25%
W to accelerate
S to decelerate
A and D to rotate
Q to switch aiming mode
turrets follow mouse pointer
Left click to shoot turrets
E to shoot main cannon
F to fire railgun
hold down R to boost
X to repair (regenerate hp)
R to boost
U to open/close upgrades menu (and pause)
Save by clicking the save button in the upgrades menu