JJ is a puzzle-platformer with really cool unique mechanics, a great visual style and that Swery touch that any fan of his works will recognize. The level design is pretty good and works well with it's mechanics, there wasn't a level I particularly disliked.
I didn't like the voice acting, it felt dull on important moments, and some of the writing is cliché, eye-rolling at times, but it ultimately accomplishes it's goal.

This a get on sale game, $25 is too much. I'm glad Swery still hasn't lost his touch, i'm definitely excited for his upcoming games.