I played it for a lot longer than i had initially planned too! Nice work!
The pacing felt a little off for a game jam, perhaps? I never felt like i got very far into the mine, just kinda kept running out of fuel pretty early on. Would have loved to have seen more of the biomes and ore that was being teased to me by that neat little map at the top.
Some balancing aside, (which i think is personally really hard to get perfect in a jam anyway) This is a very well presented, feature filled game. Was a lot of fun to mess around with, thanks!