Really nice game for a first game jam, I'm glad you were able to polish it so much, it turned out amazing. I also couldn't get past the third fuel pack, I think a little less difficulty curve would go a long way and maybe an ability control the direction of the jet pack a little more with the mouse? I loved the animations and the overall design of the game.

Video of me playing all of your games if you're interested in that:

I really like the sound effects and ambiance. I haven't figured out how to go up further than the 3rd fuel pack yet though, some puzzling is required!