Time for action – adding difficulty levels

1. Add the following declarations to the Game1 class:

   int currentLevel = 0;
   int linesCompletedThisLevel = 0;
   
   const float floodAccelerationPerLevel = 0.5f;
   
   Vector2 levelTextPosition = new Vector2(512, 215);

2. Add the StartNewLevel() method to the Game1 class:

   private void StartNewLevel()
   {
       currentLevel++;
       floodCount = 0.0f;
       linesCompletedThisLevel = 0;
       floodIncreaseAmount += floodAccelerationPerLevel;
       gameBoard.ClearBoard();
       gameBoard.GenerateNewPieces(false);
   }

3. Modify the Update() method of the Game1 class by updating the case section for GameState.TitleScreen to include the following right before the game state is set to GameState.Playing:

   currentLevel = 0;
   floodIncreaseAmount = 0.0f;
   StartNewLevel();

4. Modify the CheckScoringChain() method to increment the linesCompletedThisLevel variable right after playerScore += DetermineScore(WaterChain.Count);

   linesCompletedThisLevel++;

5. Still in the CheckScoringChain() method, add the following...