Alright, this has been on my find time and play it list for ... at least two years, and I've finally gotten around to it. Found a couple minor bugs so far and thought I ought to report them.
First, I have so far found 11 game overs, but the counter only displays 9. The one's I've encountered are, using the list on the wiki, 1-5, 7-8, 10-13. I'm fairly certain that one of the ones that wasn't counted was 11:Feral Catslave, but I'm not positive, and I'm not sure which other one wasn't counted. This is fairly minor all told, but I'd like an accurate count, as it will help me keep better track of which endings I've not got yet. Especially since if so far two of thirteen don't get counted, there's a reasonable chance of more.
I'm not sure if this is a bug or not, but the reason I don't have ending 9: breedslave, when I have ending 10: babybreedslave, or as it's listed in-game breedslave2 is because breedslave2 is the only one I can seem to trigger. As far as I can tell, breedslave2 is meant to trigger from giving birth too many times, and breedslave should trigger on loosing to a breedsprout, but on losing to a breedsprout it just triggered breedslave2. I could be dealing with old information if the wiki list is out of date, but assuming it isn't it's a bug.
Also, is it a different dragon, not the swamp dragon that's meant to trigger ending 20: dragon treasures for trying to steal treasure from him? Because all the swamp dragon does when you try to steal from the piles of copper coins and lose to him is fuck you in the same scene you get if you rest there, and transform you into a half dragon. There's no difference in the scenes as far as I can tell and no game over.
I'm definitely enjoying what I'm seeing so far, and look forward to playing more. I'll let you know if I find any other bugs.
Edit: Found another bug. In the second basement level of the jade tower (the storeroom), you can walk through the left box of spears rather than having it block your path. Also your head disapears underneath the box of dirt that you walk past on your way to the chest with the duelist hat.