I liked it. I actually finished it 100% which i haven't done to any game since Mario Galaxy 1 on the Wii. Although achieving 100% in Mickey is not much of a challenge at all, I did enjoy every minute of it.
This is just my opinion. I don't care if you agree with me or not.
Yeah, it's slow. But I actually liked the slow pace. It made me appreciate the music and artwork, it's really good. I think the biggest offender is that it's short, and obviously unfinished. The cover art suggests that the game was going to get another world and two more bosses before wrapping it up.