The project and code are good, but I have found many bugs, so I am giving it two stars now; I will update the ratings if you fix them soon.

Bugs Fixes ( 4 stars) --

1). Unexpted "All Files permission" page opens on the first install.
2). 90 FPS and potato graphics are not working.
3). Using old admob SDK ( very few ads are loading because of that).
4). SAF page is loading again and again even after applying for permission; it should open only for the first time

Improvements (5 Stars) --

1). Improve the UI/UX .
2). Add the dark theme.
3). Document should be more transparent and should be having permission details which we should provide while uploading in playstore
4). Remove unnecessary permission from the manifest not used inside the app.