When I download it for my phone it won't let me open files or install it to play it can you help me pls
Well it can be easily solved! Most of the phones don't allow users to install unknown apps or open Data/Obb folders..
These are the 2 methods you can try:
1) Use Zarchiver to open the files, you can also use 7zip and install the game or reuse your old save files.
2) Download SAI(Split Apks Installer) from play store/app store and try to install the game(Note this method can only install the game, it cannot change the things in files/data folder)