Agents
There are a variety of agents that can be collected. Each agent varies slightly from the others. Build your team to optimize its performance. When you obtain two of the same agent, keep the better agent card of the pair and sacrifice the weaker card to upgrade it.
Leveling
As you level up, you will be allowed to spend attribute points into the various statistics to improve them. Consider putting all your points into the energy meter to allow yourself to play more frequently. This will allow you to progress faster through the early part of the game, and begin gathering agents and money. Your energy will be refilled completely each time you level. With careful timing, you can level up while your energy meter is low and extend your game time. Play player vs. player missions earn some experience. Although it will not be as much as regular missions, it is still helpful.
