Thank you very much for the feedback. It's great to hear that people enjoy trying to master controlling the car. I still struggle to control it even though I spent the game jam making it feel like it could be "mastered" and not completely out of control (the control scheme doesn't help, but that's intentional).
I actually started brainstorming on turning the game into a party game of sorts just after submitting the game as I was thinking while developing that "this would be impossible to control with 3 other people".
I admit the game does feel like a prototype more than a finished product, but game jams I guess are all about seeing what you can create within a time limit. I did have to make the level a bit more "open ended" where you can go through the checkpoints in any order instead of a traditional start/finish (similar to the TrackMania series) in order to help get the game finished in time as a few other external factors came into play (not defining a scope, getting sidetracked and working on things that had minimal impact to the game etc.). It's all part of the learning experience!