Arrows to move, space bar to shoot, minus sign to self-destruct wnen your bulldozer is stuck. May look like Boulder Dash, but in fact gameplay is quite different.
There are 3 types of enemy: trigons go in straight lines until they hit an obstacle. Round ?circsaws? patrol the perimeter and explode on contact with bombs or pickups. ?Conenabs? multiply and explode on overpopulation.
There are 2 types of pickups: bombs and fuel. Time is limited, so check the dashboard often.