Use arrow keys to move the tank. Space to fire and r to restart the game.

Or tap: tap the ground to drive there, tap an enemy to close on it and open fire. Any arrow key takes back control.

Two players: the tank button in the bar (beside BUILD) switches modes. Player 1 drives with the arrows and fires with Right Shift; player 2 drives with WASD and fires with Left Shift. Keyboard only; taps are off.