Maybe a no fuel distance category could be fun, where the goal is to get as far as you can in adventure levels, without picking up any fuel tanks

I like the idea, but it would be pretty hard to get over some of the fuel tanks.

If you want to request more categories, check out this thread: https://www.speedrun.com/hcr2ce/thread/r201c

You would be able to any vehicle with any attachments like jumping and floating so you can jump or float over the fuel. it seems like a decent category