Took me a bit to figure out what I was supposed to do on the first level, but after that I got into the rhythm. Nice little puzzle game. With a nice relaxing track, a little polish and some simple sound effects I could see this being a decent distraction on mobile.
Might also consider adding a couple more friends in later levels for added difficulty and interest (though I realize that might conflict w/ the Tate & Yoko concept). Just an idea.