You begin with a robber caricature inside of a grey play area. To your left and right, you have black walls. The top and bottom of the map are covered in spikes. When you start by tapping, spikes will begin to appear on both the left and right hand side of the board. You bounce in one direction, hit the wall (which yields 1 point), and bounce back in the other direction. Your jumps are affected by gravity so the robber jumps in a quadratic curve. The game is terminated when you touch the spike.