(Spoiler) Items and others

I have to say first of all that I love the game and I can't wait for the next updates, but I wanted to know if it's possible a clarification about the objects/elements/tracks that we can interact with now and the ones that will be unlocked in the next updates, a simple example and without much spoiler would be the 10 pieces of the back door puzzle, it's just to avoid that the players kill us looking for something that is not added yet xd