Could you add something like a chapter selector or a way to jump directly to new content? My phone broke before I finished the game and I was very far into the game.
I don't think the base game should have a chapter selection since that would make the in-game decisions have less weight.
If you really want to, I have a mod that can do it as a side feature, just tap the big N on the title screen five times after you installed it. Afterwards, if you don't want any help, you can disable the mod in the settings or uninstall it again.