So if you are interested in the tilesets used, Mirage Island uses Pure Koten, and several of my other quests use Super Gameboy. I released these tilesets to the database in case anyone wanted to look into them more. If you know you need specific tiles that are not included in the tilesets, you can let me know and I can supply them.
Scripts are a different story, I do want to make some I can share, but I kinda forget to do things like comment my code, and use some... interesting techniques, so unless I make something that I intend for others to use, they are probably black magic to anyone else.
So in short, probably won't be releasing any quest passwords (even if I did to an older quest, no telling how dated the scripts are), but I don't mind if you want to make use of the tiles.