Many of them have
no funds - they're kids who find a way to "make an app" (which isn't really developing anything), they they put it on Play - and forget it.
In your particular case, you can download the app from
Apptoide. (Or you can use
Apk Extractor to create an apk file on your old phone, copy that to your new phone, and use that to install it. (If the game has a score, you can use
Helium to back up both the app and its data, and restore them to the new phone. (If the phone isn't rooted, you'll need a Windows computer to plug the phone into, for Helium to get permission to run - the instructions are in the app when you run it.)
More than one way to skin that cat.
