The demon designs are cool, but there are some issues.
The demon with the knife is way too fast.
When playing as the demon with the pistol, you can get soft-locked if an enemy gets stuck in the furniture.
The coolest demon is the one with the orbital attack, but at one point the game just stopped, and the room stopped changing.
I think the controls for all demons should be mapped to the Left Mouse Button instead of the 'J' key, and the screen rotation should be less intense.
That said, the vibe is really cool. Also, people on itch.io are often too lazy to download games (especially if they require installation). It should be easy to export the game to the browser in GDevelop (since GDevelop is HTML-based)
In any case, in my opinion, this is one of the best games in the jam, but it needs polishing