I liked the idea and the whole thing looks very simplistic, yet pretty. The sound worked well for me, both the ambience and the feedback sounds. Only the decayed keys sounded a bit out of place to me - I think that is a matter of tweaking the SFX assets here. However, the gameplay was a bit too obscure for me: I really had trouble figuring out what the game even wanted me to do and I was never certain, whether or not I was stuck or just had the wrong idea about my next action.