The more gems you have better access to all those nifty gadgets, upgrades and secret agents you'll get. You can alwyas purchase gems in apps store. Prices are: 2,500 Gems ($0.99) [...]
Your mission, if you choose to accept it, is to destroy as many villainous bases as you can! Sprint through gorgeous environments, using secret agent skills to evade every hazard the evil megalomaniacs can throw at you, from laser beams and falling trees to skidding trucks and fiery lava.