Copied from our Discord #help-and-bug-report channel (and modified to fit itch.io):
My camera broke/game zoomed in and now it doesn't follow my character
You've downloaded a pirated version that is outdated and broken. Get the latest official version on the page above instead of using 3rd party sources.
Once you've transferred your save(s), either load a save before the camera broke or use the phone's debug menu to reset the camera.
(You don't need to manually transfer saves on mobile, just update the game without uninstalling it.)