I like that this as a homage to early beat-em-ups, the feeling is captured well in the pixel art and the track is rad!
The auto-block is a bit confusing, I like the attacks being rapid but its much slower when fighting an enemy. The chosen colors are all very saturated, the clarity of the graphics would benefit from lights and darks with the darks mainly for background elements and the lights for the player and enemies to focus the eye.
Also good job on your presentation of a complete game!