WASD/ARROW KEYS to move, and "Q" to dig, "E" to dig up, also functions as a jetpack, if you get stuck under the map. "Click" to shoot, though in the current "Alpha" state (1.3) you cannot kill the enemy, but be aware, that because bullets are physics objects, you can get stuck in them, just remember, you can press Q to get out of them.
1.0 - Player And Digging 1.2 - Enemy And Guns. Aswel as basic AI. 1.3 - Enemies Able To Shoot. 1.4 - Enhanced digging, aswell as ladders. 1.5 - Changed direction of development, towards Rig'r rather than violent digging