Update: Art test, final enemy hunting

Another small update before today is over, this includes some new art we're trying out. Let me know if its too rough on the eyes.

Also, the last 5 enemies were always supposed to hunt you down, but there was a bug preventing them from doing it right. I've fixed this bug, but if you're more than 1000 pixels from a final enemy, they'll still lose you until you're back within that margin.