It's the lovely cohesive art style and animations that really elevate a simpler interpretation of the theme! You had me hooked at the first reload, and loved discovering all the weapons.
The addition of "BANG" was also a great option as it added a lot of stress to otherwise predictable combat. It's always fun to play something in a jam that doesn't take itself too seriously.
If you were to take this further, I was really hoping that when I picked up a second die, it would get added to my roll, and then I could akimbo with left and right click (or something).