Really, this is a piece of art. I love how all the pieces of the game tie together. The connections, the elements, the progression that drives the music, which, in turn, drives the motivation to continue. The only criticism I could come up with is that the music, specifically in the beginning, was getting boring quite fast. I think one could alleviate this by allowing a slightly faster progression for the first three planets. On the other hand, this might be the problem of me playing on a laptop with a touch-pad. Apart from a couple of small bugs, like connections and elements stay there when switching planets - this is a perfect little universe that you just have to love!