Hey, I just pushed out a hotfix that might solve your issue. There was a memory leak when opening the save select screen, which was already intensive enough due to the thumbnails. Try getting the new APK I just uploaded.
If you're still seeing issues, try deleting your previous saves (either through in-game or through file management) and trying again.
If that doesn't work, could you reach out to me on Twitter @JosephOPossum or email josephopossum@gmail.com so we can get to the bottom of this? Thanks for your help and patience!