I’m impressed you managed to get random generation working in a game jam! I like the physics-based gameplay too, although the physics system you’re using is a little janky and hard to predict. The geometry of the coaster is also kind of jagged, which can fling you off in weird directions.
When the physics work, I liked using them to try to make it around the loops - although I don’t think those platforms needed to be there! The loops are the interesting part. If they’re too difficult, maybe try to make them fairer without just letting the player skip them. More segments would also help spice up the level design.
Overall, a nice tricky platformer!