Dexo Games doesn't collect any data that could be tracked back to the user. The data that is collected is for analytics and making sure the game works as intended. Specifically, the analytic data is for when and how long an anonymous user is on the app.
In apps that use the camera, no face data is collected or stored, on the phone or on any other device. Also, the phone is never connected to the internet to use any features in the app.