I got a lot of help reading various forums posts here, so I am excited to share this with everyone!
Greetings from India. Internet connection is spotty here, some are on metered connections, few have broadband. So we wanted to make a small, simple, to the point, not overloaded with features, and a good looking game.
We made this using cocos2d-x:
Dhansu Tez does 55-60fps on phones like Samsung J2 Duos, Micromax Canvas A1. Any better device and it never dips below 60fps. Never!
I don’t know about KPI but VTI definitely increases with a smaller build size. Don’t know if that helps, I am actually not the right person to know these things.