You control a grey, round figure, that controls a machine that drops bombs. They grey figure can jump against the machine, to move it towards the red, round figure. Then, you make the bomb(s) explode when the red figure gets close enough to it. Eliminate all the enemies if you want to go on to the next level!
Use the arrow keys to move the figure. Press the up arrow to make him jump. Jump against the bomb machine to activate it and to eventually move it. Press the spacebar to drop a bomb, and press the spacebar again detonate this bomb.