In the new iOS game "Hundreds", once you finish each board, you can advance to the next, either by hitting "next board" or by selecting it from the level select screen.
Except when I hit next board on level 31, it takes me... back to level 31.
I'd think it was a glitch, except that the game contains ciphers, and other mysterious artifacts that lead me to believe that there's just a puzzle I need to solve.
There IS a cipher opened on level 31 (which I have not solved), but what's confusing is that I did not have to solve the earlier ciphers to progress past those levels.
If the answer does have to do with solving the cipher, please don't post its solution without using the cipher markup.