I have always found those "3 boxes" which requires a player to lay a track to get the desired "option" of interest. Really had a time trying to get them to function, after trying to find them, in the 1st scenario in which they appeared. Off hand, I don't recall having a problem with this scenario, either with the boxes or that of reaching Edinberg. Disappointingly, I had just thrown away a number of notes for the different scenarios, so cannot check on my playing or trouble spots.
Yes, this is a little different version of the initial "Miracale", but has some interesting challenges. And to me, I just like to play, although I do make comments of problems. Not suggestions of enhancments. SO, with that said, I must have enjoyed the scenarion in its entirity, as nothing comes to mind of problems.