I'll go check tomorrow errr later today (its 2am!) and see if it's still there.
I see that game pop up alot around here. I've had it since I was like 11. It was one of the first PS1 games I bought, right after Jumping Flash 2 and FF7.
The sewer level (level 2) has those circular parts you can twirl around in like a f*cktard.
It's the best.