Just like using CheatEngine.
You have to have a rooted android. Download GameGuardian.
Open the game. Score 1 point, open GGuardian search for value 1.
Try and score another point so you have 2. After there are only 2-4 results in GGuardian edit them to any number.
Score a point or just miss and it will add you highscore. Probably not the best explanation but check this youtube -- watch?v=tvw2OI4Cxsk