Yeah you're right lol. Didn't think through the physics engine tbh. For regular ground, you can only accelerate horizontally no matter what. On slopes and loops you always accelerate forward and gravity is disabled. I suspect that the best way to solve this is to always have forwards acceleration and animate the loops (which would have been a much simpler solution; 13-year-old spent wayyy too much time trying to get them to kind of quarter-function ). Also, acceleration to max velocity is too slow and there is too little friction, causing the weird siding. The lag is a problem with the unit web player (it does actually occur when you press the jump button because of weird garbage collection issues). Movement constraints and more fleshed-out systems would do good too. Perhaps I'll redo this game when I get the time.