Which note lasts four beats?

I've made another game! This time it is about note values. It involved more cutting and sticking, empty cereal packets, tin foil and of course Makey Makey and Scratch. Having thought that my project would involve me trying out one game with just one student I think I will now try a few different games with several individual students and then try them in a group setting to get some competition going. I will also ask a music teacher friend to try them and get her feedback. The question is, are games a good way of teaching music theory?