You need to maneuver a spider like robot throughout the creepy tunnels in each level. Avoid electricity at all costs. You will get points for completing each level without causing much damage to your robot and doing it quickly. You can use this money to upgrade your robot. Be careful of dying or getting through a level slow because this can put you into debt. Your robot has three arms and you can use them to help him climb through the tunnels and even on ceilings. Sometimes you may even need to hang onto the bones hanging from the rocks.