I liked the idea of having to get out of the vehicle and retrieve parts to repair then get back in and drive. Feel like the camera needs to be a bit higher so you can see what's in front of you when driving. Also had a couple points where the truck seemed sort of stuck in the terrain after fixing tires.
I can see this as the start of a good base for a point-to-point type rally traversal game with vehicle repair. Could use the same kind of retrieve parts mechanic for getting more fuel or other supplies to deliver to bases, etc.
Congrats on what you got done so far!