Nice! A lot of cool features for such a short time period.
The direction markers are cool and steering also feels good, after getting use to it.
I personally could use a marker for a car, because twice I spent way too long on searching for it :D The issue here is, that because the planet is basically featureless (I mean that there is nothing really standing out on the surface) you navigate only by shadow, and it moves!
What I quite dislike to be honest is SFX (engine) and music not looping. It really bothers me (but its probably me). But all the other sfx like picking up the delivery are nice and fitting. (Other than that non-looping feature music also fits nice.)