Well done, nice game!
I second the concerns about the level design though. The emey placement feels a bit random at times, many enemies can simply be avoided. You seem to go for some movement and timing challenges, too, which I believe could use a bit more interesting movement behaviour of the player to actually make those moments interesting. Controls are so accurate that these moments don't really challenge me.
That said, I find the graphical style quite appealing. Just enough personal style in the linework and coloring to go as stylized. Personally I'm not missing any more fancy gfx features there. Although more focus on readability in the layout might not be a bad thing.
BTW is it intentional that you can spam LMB in the blue hitzone? Feels a bit exploity. Also I was surprised that I can't seem to win against some enemies, possibly because my stats arent up to it yet? In that case it would only be fair to allow me to leave combat (some penalty included) when I realize that I can't win.
Hope you take that for conctructive criticism, keep it up, I like it!