I like the sound effects and 8-bit aesthetic. I was able to figure out the controls and how to fight the enemies after reading up on it.
Two things.
1. It would be great if you give the player some time to get used to the controls. I was thrown right into the action, and frankly I was overwhelmed.
2. I ran this game on Windows 10, and it opened inside of a postage stamp sized window. You should make it so it opens in a bigger window by default. I eventually figured out you can increase the size of the window, but my guy was already dead by then.