I love this kind of game. The progression gave me something to strive for. Visuals are nice, sounds are cool. I initially had difficulty aiming. Thank you for the speed button, and for the game overall.

Cool entry, looks like we both went for something very similar.  I liked the different models but at first the game felt a bit slow so I found myself using SHIFT the whole time.  I loved the music choices, specially once I upgraded to the battleship.  I didn't like the fact that the competing ships always knew where the next sunken ship would be, so I felt at a disadvantage.  I ended up following the other ships a lot.  Well done!

I thought the game idea turned great! What I didn't like was the slow part of the game, I could see that you tried to tackle this problem with adding the SHIFT "frame-skip", I'm used to playing games where the main objective is upgrade, but I think that getting the initial upgrade takes too much time, if you take a look on "Learn to fly" it could give you some ideas

Other thing, the first time I lost the game I didn't saw that it was because of gas, I recommend showing an alert the first time you're running out of gas, and I think the Hud is a bit too hidden

The movement in this one felt a little clunky/slow. Other than that, the game was pretty fun! Nice work.