Damn this game is hard! I appreciated having to balance my altitude, noise levels, keeping up on fuel, and dodging birds/obstacles, all while keeping track of the objectives the pilot came here for.
I think having more forgiving gas placement, or even cutting out the whole refueling mechanic would have made the game feel more fair, since it's challenging enough having to balance altitude with noise levels.
The graphics are really nice, and most of the sounds fit quite well. Nice work!