Would any game breaking bugs / issues cause that previous save file to have some problems? I know this has been the case in some games were a patch / update breaks save files.
I'm working with one generation older, and will just have the PC version - I really hope you can create something amazing with your project along the way. The great thing about Steem is we can work as a community to support each other on these sorts of projects.
Hmmm I'm not sure honestly. I haven't tried playing the html5 version of the game I'm working on, all of my testing has been on Windows 10, but I'll try to check that out.