I was realty interesting to look at the level through two different views. In one hand being able to move everywhere, but not being able to do anything and in other hand with limited movement, but able to catch ghosts.
The leveling up of ghost should be visible somewhere, because I was confised at first why I am still at the same level with my hunter after caching a ghost. I think more explanation of what is happening and what I should do wouldn't hurt the game.
But in the end I figured it myself, so no big worries.