Cool idea, i also love the art, but a few things:
1. Make the music in the tutorial a bit less "aggressive".
2. An interactive tutorial would have been awesome.
3. The explosion sounds in the background are kinda annoying, i´m sorry.
4. And most importantly: HAVE A BETTER WAY TO INDICATE HOW MUCH AMMO AND FUEL YOU HAVE!
Other than that, i loved the controls. I hope the feedback helped you, would be nice if you could check out my submission too. :)