It's a fun game, I like the rocket-boost heat tank mechanic. I do want to give some criticism;
1. I feel having the heat tank key mapped to the jump key would have felt a lot better to control, having to constantly switch between keys in your mind for an action that is very similar to each other gets a little confusing at times. That would also kinda fix the annoying "if you accidentally even look at the boost key while on the ground, get ready to do the whole level again" issue. Did that once at the end of a level. I slammed my forehead very hard...
2. While I don't think the missiles are necessarily a bad mechanic in themselves, I do think they're thrown in a bit too heavy handed towards the end, it kinda turns whole levels into a constant race with them since they just endlessly fly towards the player ever so slightly faster until they either catch up or you run out of boost and explode on the spot. Maybe automatically despawning them after a while would've helped?
Despite those things, I do still think this is a great game. Certainly one of the best I've played from the whole jam. Excellent job everyone who worked on it!