I gave up after the labyrinth (the one which seems to go in a spiral), a big level with what seemed like rooms everywhere, I got the "coin", got passed a wall and had to heal to fight a red enemy, and had no idea where I was or where I could find heal.
It's really interesting that you got that much in such a low resolution, but I didn't like the switch to labyrinth levels, since you see so little it's really hard to know where you are, and sometimes you don't even know how much you moved.