This is an issue I had with the coolmathgames version as well, that version is extremely sped up for some reason, which messes up the ghost exchange portion as well as completely speeding up the game progression. You may have to start over on a different platform since I also can't get the export savegame feature to work on coolmathgames. I'd reccomend the http://christianlaumark.dk/PlanetLife/ version, which seems to be the most stable and up-to date.