This app was mentioned in 10 comments, with an average of 3.10 upvotes
It's out. Haven't tried in on Chromecast yet, myself, though.
https://play.google.com/store/apps/details?id=com.rovio.angrybirdsgo&hl=en
edit: as /u/california2melbourne suggested, it doesn't seem to be playable on chromecast. I downloaded it and tried, no luck.
What you mean Angry Bird's GO? https://play.google.com/store/apps/details?id=com.rovio.angrybirdsgo
Did you actually look for it?
https://play.google.com/store/apps/details?id=com.rovio.angrybirdsgo&gl=US
Link (idk if it work 100%) angry birds go
https://play.google.com/store/apps/details?id=com.rovio.angrybirdsgo
They changed the game a lot and removed everyone's progress and now it's just rubbish.