Hi,
With the implementation of the expansion I had to break a bit of the simultaneous choices to make sure it works in all situation.
Generally, when there is a mirror and a ship die face, simultaneous choice is not possible as the ship will change the visible die face and could be selected by the mirror.
With the maze, it is more complex, as golem should move in the turn order to make sure that the effects are applied accordingly (for example, if 2 players can get a reward, the first player has an advantage of choice). In my implementation, I did not check all possibilities, it was way too complex, maybe someday I will get back on it
I hope I answered your questions,
Vincentt