Coming from a lot of other action roguelite games, this one's not too fun. I'll just copy what I wrote in my review:
"Enemies that dash, enemies that snipe, fast enemies that explode, "XP" that disappears if you don't collect it, "XP" collection that is completely manual and sacrifices your ability to shoot, health that only drops from bosses and level ups, special weapons all take limited ammo, no easy waves to ease you into each run, a tightly zoomed in camera that lags behind your character and giving you only about an inch of your screen for safety, no actual roguelite mechanics to give you permanent buffs..."
(EDIT: also forgot to mention how annoying the bull enemies are, their invincibility shield is too big. Also I wish their block went down completely when they're stunned.)
I think the disappearing bodies and the limited ammo for the toggled special weapons is one of my biggest grievances though, it just feels clunky as hell to swap weapons in a game like this and switch to a weapon with limited ammo, one that you have to sacrifice level ups to upgrade enough to be useful.
If "limited ammo" is an absolutely intentional, desired, high-priority design choice, I would've had the special weapons be "upgrades" to your weapon instead of a whole new weapon, make it a temporary, themed buff to your main weapon. You build up the meter like normal, activate it, and it does something to your normal shots for a set amount of time. One causes it to chain, one turns it into a constant beam, one turns each shot into a 360 degree shockwave, one makes the shots explode with AoE, etc., and when the meter runs out, your shots go back to normal.