The game itself is a very original idea very well implemented.
I certainly loved the physics (i have to say i love orbit/gravity like physics), they felt really really good.
The only thing i could say is that i don't know if it's a bug or i don't know how it works but the "Extra Fuel" keeps refilling automatically or keeping active when it shouldn't.
Overall a very very fun experience, and a very good game jam submission :)