Very interesting! I would buy this on Steam if you would add some more levels and polish it. I played until a score of 600 or so. The following arrow is a very cool game mechanic, but in my opinion it should be more physics-based. Right now it wiggles and wobbles without being predictable. It seems like it is only half way guided by the characters movement and half way searches for enemies itself. I would want the arrows movement to be fully dependant on the player movement. And I'd want it to pass through walls. Very cool game!