In terms of modern retro 3d platformers this is easily the best I have played. The characters are cute, the platforming is tight, and you need to actually think about and lab out how you use your moves and the environment to unlock certain secrets. Most impressive though is how densely littered each of the two worlds are with hidden items. There is a lot here which most players wont ever know about in a short one and done playthrough and I respect a game which hides so much without nudging the player towards it.