like the design of the level and the Easter egg you have to add like them and how you are using touch to light the way to show where you are meant to be going.
you could add some dull light to show where you meant to go or it specific area that you like someone to go to. could add some stuff to interact with this could from opening a door or just object that you have to move to find a secret or you could add something that chasing the person and that you may have to hide just something else in the game