Really fun game!
The art looks amazing, it has a lot of personality. Congrats on that part! I would have loved to have some music and SFX, cause it feels weird playing with none of that. I also really like the animations. Specially the reloading animation, I love how the gun spins around lmao. In general the shooting feels great, and it's fun.
However, it does get repetitive. There's only one type of enemy, and the levels don't vary much more than night and day. Having some different enemies, traps, things like that would spice things up.
Something else I'd like to mention is that when you spawn sometimes you do so in top of enemies which feels weird. Also, a lot of enemies got stuck in walls!
If you wish to expand your game in the future, I'd consider adding some twist to the gameplay so that you can differentiate your game from other roguelites!
Super fun experience :D