Thanks for the feedback. Yes, a relative said the same about the graves. They'd played an earlier cut that didn't have all the extra crosses and things when it was a lot clearer and noticed a big difference in understanding, and difficulty. I think it's just a case of working out what's the best way to highlight it to users - quick tutorial, lighting effects, arrows, etc. I'm thinking I'm going to use the obstacles as one way to add to the difficulty level.