Just lovely! The graphics, especially all of the enemies are really impressive and just gorgeous. The "classic" perspective takes a little getting used to and turns it into a bit of a puzzle to figure out exactly where enemies are standing :D. I only found 2 secret doors, but, I really like that the map highlights the walls that I've bumped into, so very satisfying. Took me a while (like, until the final level I played, which was the pirate island) to figure out _exactly_ what the aggro range of the enemies were (I figured it'd be either a diamond or a square pattern, neither of which was quite right, didn't expect the circleish pattern :). I managed to beat all levels on hard mode, and really enjoyed doing it, though I probably spent nearly 2 hours on it, with drawing a map by hand for one of the levels =).
Wow hardcore! I love that you made maps, that's excellent. As for distance from viewer I did do a distance check between cells using Pythagorean Theorem so it should be circular. So cool that you figured that out, it's really key for beating the levels at the highest difficulty.
Welcome to the club of people that beat the game on the highest difficulty. Well done!