Really cool and interesting concept for sure. I dig the pixel artstyle and the effect of the light actually decreasing as my fuel went down was also pretty neat. The combat is pretty simple and basic, but it works for what it is. The only real complain I have is that the map is too big for its own good. At least a blindminimap that would show the position of you and the stones woould be really great.
Overall, pretty good, with more polish it could be really memorable. Good job!