Probably the most fun 1 button game I've played. The music really fit nicely. I felt like the game was teaching me the timing and structures of the levels which made it so that I sometimes made it through levels on my first try and that gave me a nice sense of accomplishment. The levels with the single mechanic were pretty fun but when they were combined and it'd switch when you grabbed a diff color it brought the game to another level. Really awesome stuff.