The attack feels slow, also jumping feels somehow slow. I ended up just rushing through the level instead of trying to kill the monsters. I think the weakest point of this game was movement and attack of the character.
The boss fight was pretty good. The use of cues to alert the player to move before the boss attacks was on point.
Audio was nice, it sets the ambience very well.
The art is very good, the use of parallax was nice in the background, the lowres background doesn't feel nice when you look at it, but I think it serves the purpose when you are not paying attention to it.
At one point I was a lost and I wanted to open a map, I think it would've been a good addition to have a map.
Good game overall !