This is the most optimal clear possible. I didn't break a single wall until the very end, obtained all sources of free XP before using a scroll and never healed with anything more than a full heart. It wasn't actually too bad, I had to risk a 1/3 chance of losing at the very end due to an unexpected beholder but once the map is down to around a quarter you can quickly eliminate the remainders by using your knowledge of the number of specific types of enemies that are still alive. It's a great game, thanks for making it.
