Yes, Managix allows you to save and load buffers, this way you can save and load game data as well. And the same system will work on all platforms :)
Is there any chance to see a tutorial on YouTube on how this library work?
There is a documentation (with a quick start guide) and a project (.yyz) showing the code in practice, I can't record videos unfortunately. But I'll be happy to answer all questions you have on Discord.
Thank you!