场景开始时的随机数组或列表大小

你需要实例化游戏对象

public int minRandomSize = 1;
public int maxRandomSize = 20;
public GameObject blockPrefab;

public void Start() {
    int size = Random.Range(minRandomSize,maxRandomSize+1);
    blocks = new GameObject[size];
    for (int i = 0 ; i < size; i++) {
        blocks[i] = Instantiate(blockPrefab);

        // do stuff with blocks[i] to make that block different than the rest
    }
}