As reported by Macworld, the game has a single purpose – strike a red mine with a falling orb or square. By touching the screen, you generate either an orb or a square (you can switch between the two with the press of a button), and by dragging your finger away from the point of origin, the shape becomes larger. As you would expect, larger shapes are heavier, while smaller shapes are lighter.
The red mine is placed behind, under, beside, etc. some sort of obstacle that must be navigated around. Examples may be a stack of rectangles that need to be knocked over by dropping a heavy orb on top of them, or a swinging mallet that needs to be used to hit your shape across the gameplay area.
The game contains dozens of levels that become increasingly complex as you go along, requiring you to be fairly precise in your movements in order to continue on.