This isn't a problem with the game, I'm afraid - I've checked all the download links and they're working correctly. The build was also stress-tested by multiple people over the weekend on every OS.
With that in mind, the problem could be:
1. Your internet is unstable and keeps cutting out, interrupting the download. Try to use an ethernet connection if possible.
2. If you can download but not install then it's probably because you don't have enough storage space on your device. You will need at least 6GB to safely install (Android always requires 4-5 times as much storage space available as the app needs in order to install it)