Game is pretty much undone.
While playing, faced some troubles:
The problem of the game is mechanics. There is a delay in shots in jumps. Enemies aren't "hard", they are just unbalanced, they shoot for too long. Jumps are too tricky and badly used in levels. Levels are poor. The "cave" with always spawning enemies is laggy, when amount of enemies reaches the cap, game starts lagging around 1 fps, while my pc isn't even hot.
I hope you can fix such problems
You can make a great game.
Good luck in development!