Thanks! I used the Godot engine for this project and some custom shaders to emulate the various PSX effects.
The AI is definitely a little too cheesable and they aren't very aware of eachother. They don't understand the concept of "obstacles" at the moment xD. There is also no condition for shooting at the Demon while trying to go to his last known position, which is what lets you cheese them around corners.
The grenade thing was expected, but I wasn't able to fix it in time for the jam. I'll tend to it after the voting has ended.
I am very glad you liked the music :)