The save function in this is very temperamental, as others have said when you go to the info screen for Characters the Save data gets stuck inside that menu regardless of if you saved in that menu or not. Meaning whenever you load the game you will load in that menu and never be able to get out of it, essentially breaking the game.
This has happened multiple times to me now and it's very aggravating. I can't keep restarting the game all over again just because the save system is broken so I'll just wait until the game is much further along that it currently is in development in the hopes it gets fixed x-x