Sorry for not responding super quick, life's been busy... :/
Also thanks for the speedy fix! I'm planning on cranking out something soon.
For the RPG mechanics, I was thinking a rogue-like experience. For example, I was thinking mechanics that are similar to this game's mechanics. With the editor, you might have to add a window for item management, where you could turn the inventory on or off and make items. Items could have different properties like if you can wear it or eat it or use it as a weapon, and each could have stat changes that go along with it. Also, for enemies, there could simply be a checkbox which will set it to be an enemy or not. This could add new options like health, behaviors, item drops, etc.
That's all I can think of right now for the mechanics, sorry my brain is kinda fried...