Metal Blake
Like in the dirt?!?
Replayed the game up to THZ Act 2 with Knuckles. I still do not retract my original statement of slipperyness. It's really more the camera--if you twitch the mouse SLIGHTLY your character flies completely out of whack. It's like this game actively punishes trying to go fast.
If you really want to control both the camera and the character all at once, either reduce the mouse sensitivity as Katmint said, or I would seriously recommend connecting a X-Box or PS3 controller to your computer.
In fact, I play SRB2 with Borderlands-esque controls, and I find the platforming to be much easier than with the keyboard, especially in First Person mode.