A pretty good game that suffers from the time it was made in. You can't go back to your hub world after reaching the Final level (without glitches), the collectathon can get really tiring and is often compounded by the platforming that ranges in quality.

With that being said, I would still say, without a doubt it is a good game. Going into the manifestation of people's minds is a very interesting idea that is explored rather thoroughly. The writing is good, the game is fun, it's not perfect, and it's successor is incredible.