I think I picked this game up very cheap in a bundle. It wasn't until much later that I tried it. First, I have to say that I love the art direction of the game. Quite often, it seems that artistic games really aren't that great. However, this game is quite beautiful, runs very smoothly with modest specs, and is actually fun. It's definitely odd in a way that not too many games can pull off. I have only played it briefly to see what it was like, but I would definitely come back to this game at a later time.
Lastly, I wanted to add as someone had mentioned, that this game is mostly a 2D platformer/adventure game with heavy Shoot'em'up elements. Somehow, it works. This game is pretty, unique, and is a piece of art.