can you transfer save files between versions?
If you're just going from version A to version B on the same computer, the save will still be there. No guarantee it will work, though, cuz this is a game still in development.
But if you're trying to use the save file of a different computer, uh, no, that doesn't work. You can load the file, but your character will spawn into the game outside the map and you'll just fall forever.