Small "bug" on mobile, it appears we cannot save the game past a certain amount of pages... i had a save at 90ish, and one at 60ish but i tried to save my latest which is at 171 and well ... it doesn't work.
Not sure if this can be classified as a glitch though cause everything else works fine.
(Side note: I found out that removing the default worlds and only using one helps with memory and processing)