Like some others, I didn't really like it at first - the 3rd person camera feels like it's parented to the player object which ends up making the controls feel stiff, and I didn't realize I'd missed a pickup that let me use one of the doors in the main room, so I kept trying to figure out how to get through the one that takes the nitro.. It wasn't until I read some comments that I thought about looking around for more pickups.
And that's when it changed. The reset mechanic that seemed kind of annoying at first was suddenly lending a sense of urgency to the search around the maze (that ended up being shaped like a brain, which was a really nice touch!), and the different music in each tube and things really made the sections of the maze feel different. By the end, it was a blast! I'm not entirely sure how I opened the last door (I think it involved the flashlight colors, but trying to get the right colors on purpose, point the flashlight at the objects, etc, didn't get me there ... but mashing buttons a bit did?)
Dunno, but great fun, and a neat twist on the theme - you start with such nothing that the ability to _turn_ is a powerup. ;)