How do I get my game back I have changed phones?

I don't know the answer to your question. However, I would try by starting with uploading (to a computer) all files related to Golf Rival(R) in a folder from the old phone. Install Golf Rival(R) on the new phone, then download all the Golf Rival(R) files (saved from the old phone, to a computer) to the new phone, overwriting any duplicate files. I wish I could experiment for you, but I'm not in need of a new phone.