Thanks for the feedback! I agree with everything you said. The game is far from polished. I started adding content after content, features after features and at the end there was no time for polishing or even to find some royalty-free ambient music. BTW if you are interested, you can watch just the beginning of my walkthrough video (first 15 seconds) to see how the game should've started, the ground enemies actually should hit and damage the player, but on the final build something went wrong.
Thanks again for the feedback. It felt really honest and constructive. I'll play your game tomorrow!