On supported devices, it is possible to cast your phone's screen to a Chromecast, which will allow you to use the app on a bigger screen. To do this you will need to have the Chromecast app installed and cast your phone's screen to another device. We do not have an in-app Chromecast button in Superhero Workout.
For more information on this, please see this Google help page: Cast your Android screen from the Chromecast App