Fun and fluid, nice track

A few critiques.

Some spots have multiple checkpoints right next to each other (e.g. the very start). One is enough. As well, it's not really necessary to have a checkpoint right next to the end.

Some objects aren't aligned to the track, like saws. I can't tell if that's intentional or not, but if not, you can right-click on the track right next to them and use alt+S to align them to the track, then rotate them to your liking.