This game can be more complex than I expected for a game jam entry. The upgrade system is well made and pretty deep and incentivizes multiple runs. The gameplay may be simple, but it's pretty damn effective. It reminds me somewhat of Hill climb racing, in 3d and with many more explosions, and the night-day cycle is a nice touch.
I think there are a couple of issues though: sometimes I got hit by the airstrike with no way of reacting, the intervals between fuel can be too long (although this may be intentional, see Hill Climb racing) and, the weirdest of them all, if you drive in reverse nothing spawns and you don't use your fuel. It took me a bit, but I managed to clear the whole stage this way, without any upgrade.