Good job!
I really like the attack being a physical thing and not just a hit box that show up only when you press a button, it's pretty inventive, it allows you to run though enemies, which is fun but kinda risky.
I'd appreciate a HUD tho, there's no way to know how's your health or fuel. Speaking of fuel, took me a while to realize that the jetpack won't work after you jump, which is weird and not very intuitive, specially since it ALMOST works, but then just doesn't. Made platforming a bit frustrating.
Overall, pretty cool game.