Not inovativ and much to easy.
I must say, it's really a good, creative idea you have with this. I tried it multiple times and loved it. I guess only cavemen of some sort won't like this lol :D I gave you a 4 rating, because of a lack of music. I think the genre you should be using at this kind of piece would be a mysterious vibe (just an idea), so that it drives players to try again and again, if not because of the gameplay but because of the music. Who knows, they may notice what's REALLY fun while doing that. Good work.