← → move and drill sideways · ↑ fly · ↓ drill down · Esc pause · R reserve fuel · F nanobots · X blast charge · C deep charge · T recall · B uplink · M music · N sound. Fly into a building to trade.

Drag anywhere on the left to move, fly and drill. Hold FLY with your other thumb. Turn the phone sideways, or add this page to your home screen, for the full-screen game.