AI starts up automatically, special tiles are in

Assets/RealCode/GameBoard.cs

@@ -50,6 +50,8 @@ public class GameBoard : EntityBase, IAutoSerialize, IAutoDeserialize {
 	// Tile timing
 	private int TilesUntilActivator = 3;
 	int nextActivator = -1;
+	private int ActivatorsUntilSpecial = 10;
+	int nextSpecial = -1;
 
 	public float nextRootX = -1, nextRootY = 12;
 
@@ -65,6 +67,11 @@ public class GameBoard : EntityBase, IAutoSerialize, IAutoDeserialize {
 
 			lastActivatorColor = activator.color;
 			
+			if (++nextSpecial >= ActivatorsUntilSpecial) {
+				nextSpecial = 0;
+				activator.kind = TileKind.Special;
+			}
+
 			if (Random.value > 0.5f) {
 				pair.left = activator;
 			} else {
@@ -108,8 +115,9 @@ public class GameBoard : EntityBase, IAutoSerialize, IAutoDeserialize {
 			case DelayState.Collapse:
 				if (timeInState > airCollapseTime) {
 					board = Collapse(board); // Remove air 
+					board = SpecialActivation(board, out bool didSpecial);
 					board = ActivateOnce(board, out bool didActivate);
-					if (didActivate) {
+					if (didActivate || didSpecial) {
 						delayState = DelayState.Combo;
 						++Combo;
 					} else {
@@ -459,6 +467,48 @@ public class GameBoard : EntityBase, IAutoSerialize, IAutoDeserialize {
 		return bs;
 	}
 
+	// Activate all special tiles
+	BoardState SpecialActivation(BoardState bs, out bool didActivate) {
+		
+		didActivate = false;
+		//return bs; // Test short-circuit
+
+		for (int x = 0; x < bs.Count; ++x) {
+			var col = bs[x];
+			for (int y = 0; y < col.Count; ++y) {
+				var tile = col[y];
+				if (tile.kind == TileKind.Special) {
+					if (y > 0) {
+						// Get the color of the tile we are on top of
+						var under = col[y - 1];
+						tile.kind = TileKind.Activiting;
+						tile.color = under.color;
+						bs = ActivateAllColor(bs, under.color);
+						didActivate = true;
+					} else {
+						// Special tile is on the bottom, swap it to a random activating tile
+						tile = TileInfo.CreateRandomActivatorTile();
+					}
+				}
+			}
+		}
+		return bs;
+	}
+
+	BoardState ActivateAllColor(BoardState bs,TileColor tc) {
+		for (int x = 0; x < bs.Count; ++x) {
+			var col = bs[x];
+			for (int y = 0; y < col.Count; ++y) {
+				var tile = col[y];
+				if (tile.color == tc) {
+					tile.kind = TileKind.Activiting;
+				}
+			}
+		}
+
+		return bs;
+	}
+
 	int CountActivations(BoardState bs) {
 		int total = 0;
 		foreach(var col in bs) {
@@ -620,12 +670,16 @@ public class GameBoard : EntityBase, IAutoSerialize, IAutoDeserialize {
   public void Setup(){
     board = BoardStateExtension.Initialize();
 
+		StopAllCoroutines(); // Murder all coroutines :'D
+		// This is to reset the AI
+
 		// Build the list of possible placements the AI may use
 		PossiblePlacements = GetAllPossibilities();
 
 		lastActivatorColor = TileInfo.CreateRandomActivatorTile().color;
 
     nextActivator = TilesUntilActivator;
+		nextSpecial = ActivatorsUntilSpecial;
     delayState = DelayState.None;
 		timeInState = 0;
 
@@ -690,6 +744,8 @@ public class GameBoard : EntityBase, IAutoSerialize, IAutoDeserialize {
 			repeat = false;
 			bs = Collapse(bs);
 			bs = Activate(bs);
+			bs = SpecialActivation(bs, out bool didActivate);
+
 			var newActivations = CountActivations(bs);
 			if (newActivations > 0) {
 				comboLength += 1;
@@ -811,14 +867,21 @@ public class GameBoard : EntityBase, IAutoSerialize, IAutoDeserialize {
 	}
 
 	[ContextMenu("Startup AI")]
-	public void StartAI() {
+	public void StartAIDefault() {
+		StartAI();
+	}
+
+	public void StartAI(float thinkTime = 0.5f) {
 		AIEnabled = true;
+		AIMoveTime = thinkTime;
 		StartCoroutine(AIThink());
 	}
 
 	public bool AIEnabled = false;
 	public float AIMoveTime = 0.5f;
 	IEnumerator AIThink() {
+		yield return null; // Wait a frame before trying any shit
+
 		int totalMoves = 0;
 		while (delayState != DelayState.Loss) {
 			if (!AIEnabled)

Assets/RealCode/GameBoardInstance.cs

@@ -14,6 +14,9 @@ public class GameBoardInstance : MonoBehaviour {
   public Sprite[] lit;
   public Sprite[] activators;
 
+	[Header("AI difficulty, 0(easy)-3(hardest)")]
+	public int AIDifficulty = 1;
+
   private void Awake() {
     instance = this;
   }
@@ -35,7 +38,9 @@ public class GameBoardInstance : MonoBehaviour {
 
       player1.Setup();
       player2.Setup();
-    }
+
+			player2.StartAI(new[] { 0.5f, 0.2f, 0.1f, 0f }[AIDifficulty]);
+		}
 
     GameTransition.Instance.state = GameState.InGame;
   }

Assets/RealCode/TileRender.cs

@@ -26,6 +26,10 @@ public class TileRender : MonoBehaviour {
       case TileKind.Activiting:
         sprites = GameBoardInstance.instance.lit;
         break;
+			case TileKind.Special:
+				int timeSprite = (int)(Time.time * 4);
+				renderer.sprite = GameBoardInstance.instance.activators[timeSprite % 4];
+				return;
       default:
         sprites = null;
         Debug.LogErrorFormat(this.gameObject,"{0}, {1}, {2} not supported by tile display", tile.color, tile.kind, tile.counter);