There are some cool ideas here! The pixel art and particle effects all look great! There is a lot of content for a jam prototype.
I wish the character select screen had stats/details - I wasn't sure if I was picking a character class, or just an avatar for my character.
The dungeon was very maze-like, it would be nice to have a map or some other way to see where I had been and where I was going.
The collectible companions are a really cool touch! It was a little difficult to read which characters were friendly and which were not. I picked the guy in the blue cloak, so it was especially disorienting that my allies were red, and enemies with the same sprite were blue. Both companions and enemies could also attack through walls. I spent a lot of my battles hiding in a corner while my companions beat up the enemies.
I noticed that my bullets did not always move in the right direction. If I am walking north and try to shoot south, my first shot will go east or west. I'm not sure if this was by design or not.
I had a dash ability that I could only trigger with the mouse, which I discovered by accident, since it was not listed in the controls!
Good luck in the jam rankings! This is a pretty submission overall. Despite the quirks, it's very impressive that you built a top-down procedural dungeon crawler with this amount of variety that looks this good!