I was doing this shit yesterday and today a little bit, but it's driving me crazy. I post it here even if it's a crappy demo so that I will force myself to finish it later.
https://jsfiddle.net/deubk3h7/show/Make Eru twerk to the beat. The yellow circles will mean you have to flip Eru, and the regular black circles are twerks. Of course, no points/penalties are being registered now. I will work on this shit on the weekend, I hope. When I finish I will send it to Eru.