Concept Sketch #3: Motion sensors catch any passing feet along the bottom 6-12 inches of the room. To make the gameplay more collaborative and more suited to a wider range of ages/physical talents, touching all the bellies are not necessary for a
win, but they help you get to the other side of the room. Modelling and experimentation with track slope, number of beer bellies, and room width can be done to optimize difficulty of the room.