Suggest me a game for teaching purpose :/

I will be taking a session on android game development soon at a development bootcamp. The audience there are going to be mostly newbies at developing games. So I am thinking about cloning a simple game on stage that would be easy to understand for them. I am going to be using LibGDX for this purpose. But I am totally clueless about what game to choose for this demonstration. any suggestions? ??? ??? ???