very clever idea, and...well, i wouldnt call it fun, but i played it and enjoyed it...its very much a chillaxing game
the fact the yellows and purples are randomly generated is a little annoying...perhaps a fixed variable command so the same number appear, if not in the same places?
overall very good game, 4/5
i downloaded the game and managed to get perfects on all the songs, but online i find it difficult in songs such as the crazy dog one, as when you get a line of the same note in quick succession the game has a tendency to lag just slightly and therefore screw up getting a perfect!
However its a FANTASTIC game, 5/5, and people complaining its too hard, just arent getting into the rythm of it!