I encountered a few minor bugs, nothing game breaking like, entering a room from an odd point relative to where i was, or a boss health bar starting at half and going to full a moment later, or the wall enemies not necessarily only moving on walls but also the air xD .
Overall this is a nice little game similar to "the binding of isaac". Though i get that you, as the player, are the weapon, it still feel like you as a character with a gun.