I got insanely lucky and actually found the game on a random eBay sweep. It was sold in a bundle with three other games for a total price of $20. Spine, registration card 'n everything.
The game's pretty much exactly what the review says. It has this undeniable charm. Controlling the bike, especially in robot mode feels clunky at first but with bit of practice it starts to feel natural.
Having the ability to control the camera would be nice, and I wish there'd be a "Time Attack" or something so you could attack levels individually and improve your times on them.
Overall, it really is a charming, unique game. Much thanks to Joe Salina for the review, pretty much nobody would know about the game without it.