Switch to the LEVEL1 scene. Double-click on the PlayerData script to begin editing it.

Add a public int score and a public GameState level; note that in order to create an instance of the enumeration defined inside the GameMgr class, we need to prefix with GameMgr as shown in the following code:

public class playerData : MonoBehaviour {
public int score;
public GameMgr eGameState;

Add a public method called addScore(int dScore). This method will be used by the different systems (primarily MissionMgr), to add score to the player's record. Note that since we use an integer for score, we could use this same method to add score or penalize the player (by adding negative scores) as shown in the following code:

public void AddScore(int dScore)
{
  score += dScore;
} 

Add a public...