Alright now here are some thoughts
For one, please change the button to shoot. The E button gets in the way of WASD which makes it very easy to bump into spikes or a bullet. I would have much rather prefer right click to shoot instead.
The crate's hitboxes are a little wonky. There were times where i spent a total of 10 seconds trying to break one with the roll. I later understood you could also shoot them to break them open, so theres a nice compromise.
You can easily get ambushed by the skeletons, so i suggest making them a tiny bit slower for a little more breathing room.
In the first room, i didn't understand where to go until i gave the walls a hug. I suggest making the exits a little more clear to see so people fumble around alot. Another problem is that sometimes is when you enter a room, you are guaranteed to take a hit to a spike if your going too fast. Maybe have the spikes spread out a little more?
That's all i can say really, everything else was fine for me! Would like to see some more updates to the game soon! Take your time!