A lot of things have been added, and just writing them down here would be too overwhelming. I suggest you read the patch notes to catch up, or just play the game
https://play.google.com/store/apps/details?id=com.mambet.tv&hl=en_CA&gl=US - the link to BOOYAH! is here.
Use the app Google Opinion Rewards. You can read the description in About App of play store. Just a small heads up- it gives surveys(they say about once a week but I get once a month) and you answer those surveys and earn play credit which you can use to buy paid games or have in-app purchases (which is your case). P.S- I don't think it is available in iOS