This guide is a how the game works on the Steam Deck from Beta Tester's experience. We found the game works best with Proton 8.0-5. The settings from the game were not changed and left on the highest settings at about 30-35 FPS so lowering them is recommended.

Here is a list of the recommended controls for the game.
B button = G Key
A button = Space Key
Y button = R Key
X button = B Key
Left Bumper = Q Key
Right Bumper = E Key
L4 = 1
R4 = 2
L5 = T Key
R5 = 5
The 3 lines = Escape Key
DPad Up = F Key
DPad Down = P Key
DPad Right = H Key
DPad Left = N Key
L2 Full Pull = Right Mouse Click
L2 Soft Pull = Right Mouse Click
R2 Full Pull = Left Mouse Click
R2 Soft Pull = Left Mouse Click
R3 Click = Control Key
L3 Click = Shift Key
Right Track Pad = Scroll Wheel
Right Track Pad Click = Tab Key