Hallelujah! There are scattered bugs but they have not been a priority. Sorry about the crashes. Did you get a decent frame rate?
How did you get back to the bridge after going all the way to the bottom? After getting the gem you should talk to Luna and then there is no more content. I'm not sure anyone is finding Luna. You should be stuck in the dungeons for now.
I'll put something about where the game 'ends' in the next release.
Thank you for your help.