Unity1Week GameJam お題「Space」に参加しました

GameObject createBlock(string name,out int[,] retMap)
{
	int[,] map = new int[blockSize,blockSize];
	GameObject parentObject = new GameObject (name);
	parentObject.transform.localScale = new Vector3 (blockSize, blockSize, 0);
	do {
		//ループした場合に前にInstantiateしたオブジェクトを一旦消去する
		foreach(Transform tsf in parentObject.transform)
		{
			Destroy(tsf.gameObject);
		}
		for (int i = 0; i < blockSize; i++) {
			for (int j = 0; j < blockSize; j++) {
				int rand = Random.Range (0, 2);
				if (rand == 0) {
					GameObject t = (GameObject)Instantiate (tile, new Vector2 (i, j), Quaternion.identity);
					t.transform.SetParent (parentObject.transform);
					map [i, j] = 1;
				}
				else
				{
					GameObject t = (GameObject)Instantiate (blackTilePrefab, new Vector2 (i, j), Quaternion.identity);
					t.transform.SetParent (parentObject.transform);
					map [i, j] = 0;
				}
			}
		}
	} while(isEmptyMap (map));
	float offset = (float)(blockSize - 1) / (blockSize * 2f);	//がんばった計算式
	parentObject.AddComponent<boxCollider2D> ();
	parentObject.GetComponent<boxCollider2D> ().offset = new Vector2 (offset, offset);
	retMap = map;
	return parentObject;
}

Vector3 diff = Vector3.zero;
void OnMouseDown()
{
	Vector3 clickPointScreen = Input.mousePosition;
	Vector3 clickPointWorld = Camera.main.ScreenToWorldPoint (clickPointScreen);
	diff = gameObject.transform.position - clickPointWorld;
}
void OnMouseDrag()
{
	Vector3 mousePointScreen = Input.mousePosition;
	Vector3 targetPointWorld = Camera.main.ScreenToWorldPoint (mousePointScreen);
	targetPointWorld = targetPointWorld + diff;
	targetPointWorld.z = 0;
	this.transform.position = targetPointWorld;
}

enum CollisionStatus
{
	None = -1,
	Target,
	Other
}
CollisionStatus colStatus;
void OnTriggerStay2D(Collider2D col){
	if (GameManager.Instance.targetBlockName == col.gameObject.name) {
		colStatus = CollisionStatus.Target;
	} else {
		colStatus = CollisionStatus.Other;
	}
}
void OnMouseUp()
{
	if (colStatus == CollisionStatus.Target) {
		Debug.Log ("Collect!!");
		GameManager.Instance.OnBlockDrop (true);
	} else if (colStatus == CollisionStatus.Other) {
		Debug.Log ("Miss!!");
		GameManager.Instance.OnBlockDrop (false);
	}
}