Tightly tuned, but also took me a while to realize I'm supposed to not press W while being boosted to conserve "inertia". I think there's a fuel-efficiency game also hiding somewhere in there.
Slightly disorienting was the camera often clipping into the models during the start/end of a level. Other than that, the last level was way too easy in my opinion, but I'm assuming it's because of time constraints so that's fine.
Bonus points for using a non-mainstream game engine!