Lol I can work something out. On one of the floors there's a puzzle and if you have a certain necklace and use said necklace between 4 buttons that appear you'll have 30 seconds to complete the puzzle or a boss appears. I love your idea though!
I have no clue how to make a skill tree (can barely edit the menus look) I could make it so you choose the gender, though I'm more so leaning towards leaving them genderless unless choosing random since it gives a challenge. I plan on trying to add passive and quests. Might just rework all skills, and try getting magic based skills working.