1) The general idea of the quest are layers aka dimensions. Something happenend in MD, but your not sure what. After some strange encounters, a layer will open and you are able to shift events and change the story. The story is based around some individuals who don't know who they are and where they came from, yet they are connected somehow. The quest will go similar as storymode with multiple endings. There is a replayability because of this, there will also be a final ending when you got every possible ending at that point. Shifting through layers via an item in your inventory will cover or uncover some pickables/clickables.
2) The quest will make use of some new clickables positioned across some lands. I also need the feature that a clickable appears when you've got a certain itemfd in your inventory. I would also like to have a clickable that has multiple stages/images similar to the bushie plant, only this one requires pickables to advance which are picked up earlier. I think this is called a progressive combiner, else put that feature in the list of features that needs to be added for this quest.
3) An item that allows the player to shit through the layers, this is just an item that changes in a similar item when used. So that that other item can be used to let a pickable/clickable appear in the scene.