All right I got to the end of the campaign. Here's some feedback.
There's definitely fun ideas here. Deacelerating so that you can move horizontally. Some of the art is pretty cool, the enemies and the monster at the end.
Where the game really lacks is in feedback to the player. It took me a long while to understand that hitting the fans was what was causing me to lose all my fuel. I think making fuel the health bar is a good idea that streamlines things, but this would be more understandable if there was some animation or sound when hitting something. And maybe if the fuel indicator blinked in that case. I understand art is not that easy to do, but I think that even some camera shaking would help.
It took me a long time to realize you had to click the fuel/gun upgrades to get them.
Maybe two modes is too much to deliver during a COMPO and polishing a single mode would have yielded nicer results.