An excellent little game :) !! Well done mate !
The down points for me are having only one health point (too brutal !!!) and having enemies spawn right next to the player which led to unfair deaths.
However there is A LOT to like about this game, it holds so much potential ! Being able to smash your hero into a bunch of enemies feels incredibly satisfying and juicy ! And the pixel art is awesome, it has a real downwell vibe to it !
In short, keep up the great work :))) !!