Yeah, that's right, you can't put any other files in there, though I don't understand how they get there in the first place...@Faerin About this issue: After i open the game text message appears"made with unity", then screen remains BLACK.
It happened to me too and I noticed if there are any other files in savegames folder except the .sav files and thumb_X.jpg files the issue above manifests.
I tested with a text file and an image file PNG format, even another JPG file that has any other name except thumb_x.jpg.
If only the .sav files and corresponding thumb_x.jpg are in savegame folder the game starts OK.
But thanks for letting me know!