Pretty much effective work all throughout: great graphics don't have to be complex and this is a great example. Everything looks and feels slick as all hell.
The difficulty is just about right. I think there were a few moments where the intro to a level felt more punishing that the end? Probably my only gripe. Everything was doable and super fun.
Loved the primary mechanic. Felt like one of the more clever uses of teleportation I've seen!