I guarantee that wherever you want to go in life, video games wont get you there (unless you want to be programmer or something)
The only way to have a smart kosher phone in my opinion, is to restrict the app store and browser and delete all apps that have internet access, also restrict webpages to the white list mode, where only the ones you allow,are available. i think its called exceptions list or something. also delete any you tube or Facebook apps or similar.