To skip 13, make 2 maps at once. There, you get 14 maps, lol.
The 13th map could be the volcano showing the origins of the fearless armor, 13's reputation as being unlucky would be marvelous to fit that map.
The 14th map could be the second most voted map in the Discord server.
The Aztec map is so detailed and fun.
We hope to see more soon. Take a rest, maybe for two months, you'll need it after making 12 maps.