I'm not very familiar with Ren'Py, can I use saves from the Linux version in Windows?
Yes. Save file locations are found in the following directories.
Windows: %APPDATA%/RenPy/TownOfMagic
Example: C:\Users\[USER]\AppData\Roaming\RenPy\TownOfMagic
MacOS: library/RenPy/TownOfMagic/
Linux: ~/.renpy/TownOfMagic
Android: Phone\Android\data\www.townofmagic.com\files\saves
