That's a fair game. Here is a bug report: when you dash into the next level (from the chest level to the first boss) your character doesn't work, you can't do anything and you die.
The double jump upgrade comes back even if you purchased it
Graphics are ok, but menus are kinda bare-bone. No level except bosses, grinding is too high for the begining, you need to make pretty much everything better. Music is simple but good tho, I find it to be one of the highlights of the game.
I'm sure you can finish this game and make it good, but it takes time and proper testing (multiple people trying to break it). You gotta be patient, the rewards are much better for game devs if they take the time to make their creation as good as they can be, else, your efforts are pretty much wasted. Hope it help.. : /
cheers!