Contour is a clever re-imagining of Marble Madness by Sean Hawkes, creator of several games entered into previous competitions such as Orbit and Clack. An isometric grid is placed over the playing field that holds a ball and a white exit square. Click on individual tiles to raise the ground from that point, causing the marble to roll downhill. The goal is to move the marble to the exit tile by raising and lowering the floor, a feat that requires both intelligent planning and fast clicking.