The game is pretty good, there are a few things though-
The bullet sound doesn't play when it hits a far away wall, it probably should play when you shoot instead, also you could definitely tune down the bullet sound. Also, the jump felt really floaty, try giving the player a little bit more gravity and decrease the weight. or maybe it is the other way around but that wil make the jump feel less or more floaty. Also, the enemies didn't really feel threatening because i could just one hit them without them even getting close, and killing the enemies didn't really feel too impactful because they just disappeared.
Anyhow, that is a lot of negative things, but that was not my intention. Good stuff, needs a bit of improvement but is fun nevertheless.