Really nice one! Massive Guitar Hero vibes lol.
Difficulty is fine for me (maybe a bit too easy), could probably be cool if it started slow and build up speed as it went, would give it more replayability as well.
One thing that I disliked was that the Yellow Toy on the fourth lane was really close to the Green Toy, as I manly look at positioning to get them right, i messed up a lot cause of it.