You just copy and paste the "saves" folder from one game folder to the other :)
WHERE ARE SAVES LOCATED ON PC?
PC > Local Disk (usually C:) > Users > USERNAME > AppData > Roaming > RenPy > CorruptedKingdoms-1547378918
WHERE ARE SAVES LOCATED ON MAC?
~/Library/RenPy/CorruptedKingdoms
WHERE ARE SAVES LOCATED ON LINUX?
~/. renpy/CorruptedKingdoms/
> WHERE ARE SAVES LOCATED ON ANDROID?
> Android/data/com.domain.corruptedkingdoms/saves