A little more details would have been helpful but i assume you use Android.
1 Simply download the apk and install it like any other app.
2 Download it on your pc and use usb to transfer it to your phone.
For android, I keep getting "update" option for your game, and I keep dealing with error. I checked my files and I do not have the game in my phone.
There is only two build for android, demo and the full game so you should not be able to update the game and since you do dont try to update it. i dont know wich build you have but if you got the full game just download that version instead.
