One of my favorites so far. It did take me a minute to figure out the controls and the objective, but once I did, I was hooked! I also really like the demon-mode sound. Well done
Also side-note, it'd be nice if you listened for a keypress of the ENTER key to restart the level. I found myself wanting to use WASD and the right shift key, so I could more quickly and comfortably switch between demon mode and normal mode, but then had to move my hand to the mouse to restart. Minor feel complaint