Really cool. I've been hunting for all the other casino shooters in the jam and this one's been a real highlight. Huge props for the intro and how atmospheric it was. I also loved the lights out + giant roulette wheel moments, they were super vibey. I liked the steady pulse of the music and how dynamic it was, with layers coming in and out as the fight progressed, set a real tone.
Shooting and movement felt nice, and the mechanics were really neat.
I may have missed it, but I'd suggest maybe a key mapped for a quick reference on the bullets as the player gets started - I found myself going in and out of the menu a lot trying to remember what all the different types did as I got into a flow with it.
Overall, really great entry. Made me feel like I was locked in a soul duel with a truly scary foe. Sounds like a good boss fight to me :)