This is a very interesting concept that I hope you're able to figure how to expand upon it. The background needs to be more than a solid color though, because right now there's no frame of reference for anything. I only realized I was still moving even without pressing any keys when I saw the edge of the map. I also found that moving away from the monsters while aiming at them was the only way to heal them, since it seemed the potions couldn't reach them when trying to chase them.