Incredible visuals! Really looks like a professional game already! Oo The sound design was also top-notch, and I really love the game’s setting.
I played with mouse and keyboard and while it controlled well it took me a while to figure out what buttons to press so it would be nice to include the keyboard keys on the instruction graphics. I also found only being able to shoot were your looking a bit frustrating and would much prefer being able to aim freely regardless of my movement direction.
The enemy variety was great, but I would make it so that projectiles of enemies de-spawn after some time and/or of the enemy that spawned them dies. With the projectiles staying in the level forever the bat and horned enemy felt a bit unfair as the projectiles could block your path and force you to take unavoidable damage each time you cross their room. You also should probably try to make the rooms a little bigger with no enemies directly next to the doors and/or give a short period of invulnerability when entering a room as you sometimes would directly take damage when entering a room with no time to react. The shop with consumables and stat upgrades was a great idea, I would love to see it updated with a randomized selection and some more unique combat upgrades.
All in all: really great work!