I also strongly recommend playing through the map clockwise (starting from the Valley of Metal); otherwise, errors may occur.
There are two possible solutions:
1) Make it so that the map can only be played clockwise and in no other way (i.e., eliminate the possibility of an error);
2) Make it so that the map can be played in any way and still work correctly (without errors).
The second option is better, but that's up to you.
Overall: I wish you success in mapmaking.
Блистает там воздушностью прогалин.
Но между кедров, полных тишиной,
Расщелина по склону ниспадала.
О, никогда под бледною луной
Так пышен не был тот уют лесной...