I had so much fun playing this game.
Some things I would like to input from playing the game, I'm not sure what your plans are for the game.
1/ The game is incredibly easy, having to complete it on my second run. I did expect it to make me suffer a little more.
2/ I personally didn't encounter any bugs which I'm sure you'd be happy about.
3/ For the game to be longer, i.e. More levels and bosses.
All in all I'm excited to see where this game goes.