Complex sentence: One of the biggest issues for Supercell at the moment is game balance, Supercell are trying to make sure paying players get a better experience than free players without making such a huge difference which result in a lot of players quitting their games.
Split into simpler sentences: One of the biggest issues for Supercell at the moment is game balance. Supercell is trying to make sure paying players get a better experience than free players without making such a huge difference which result in a lot of players quitting their games.