Hey,
You should add screenshots there, not the app icon. It is very unlikely people will download apps without seeing what they’ll get

I do like the idea of your app but I really do not enjoy your user interface. It is not clear at all how to start playing music… I recommend you to change this and maybe also stick to Material Design Guides by Google.
Also it takes a few seconds after you chose a radio station from the list view until music starts. I would recommend to add a loading notification at that point so the app does not seem unresponsive
best regards,
Chris