Cool concept, liked the super oldschool color palette.
The gas mechanic definitely needs some fine tuning -- I was able to beat every mode simply by going off road the whole way. I think it might be better if the gas drains significantly faster when you're off road, but then maybe destroying things with the laser drops gas pickups?
Because the laser cooldown was so long in easy mode it almost felt easier to just focus on driving rather than trying to line up shots. In hard mode it felt much better.
In hard mode the enemies start spawning in little clusters because you're going so fast. This almost makes it easier, because you only have to dodge small pockets of enemies rather than having them all around you.