Chromecast dongle control, more than just play interface

Certainly not very experienced in THR or chromecast dongle (google tv or whatever they are now referenced to as), but when THR discovers the chromecast device, it basically discovers it and provides mostly a “play type” control on the HR hosting device along with the corresponding on screen display towards any chromecast attached display. Is it possible to allow it just to have navigational control (uo/down cursor and select) of the existing chromecast “home” screen or that some other interface? Thanks for any guidance on this… it will help me from banging my head against the wall.