I quite like the sound design and the overall look of the game.
That being said, it needs a lot more variety to keep the player attention; all of those levels were basically run and gun and you didn't have to aim at all. It could use some platforms, flying enemies, stuff that spices things up.
You've put a lot of work and energy in this and it shows, keep it up!
Side note, try to make a web build for your next jam as people usually don't chance installing stuff on their computer.