There's potential here! firstly with movement it feels clunky in the way that acceleration in the movement is too fast. when you land a jump your it feels like velocity immediately goes to 0. I think a little bit of deceleration would be nice.
also agree with others, gun enemy should have projectile not line trace.
needs quicksave button ! on dying nothing happened for me, no click to start over.
Difficulty jump from medium to hard seems too much. medium is a bit easy.
I like this game though, even though its dark aesthetic I think its too much brown