We show the player what to do - if that is not enough, we tell them. We let our players know with signals and queues; visual effects, light, movement, and paths, where to go and what to do. 
If that is not enough, we add more prominent visual and auditive supporting assets pointing out the next step in their journey. Finally, if that do not explain what to do, we use words and instructive text and feedback.  

- Do we show the player what to do and where to go without words first?