SaveScript

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class LevelSave : MonoBehaviour {

    public int floorContainerChildCount;
    public GameObject FloorContainer;
    public PlayerData[] playerData;

    [System.Serializable]
    public class PlayerData
    {
        public string name;
        public int x;
        public int y;
    }

    void Awake ()
    {
        FloorContainer = GameObject.Find("FloorContainer");
    }

    private void Update()
    {
        floorContainerChildCount = FloorContainer.transform.childCount;
        if (Input.GetKeyDown(KeyCode.Space))
        {
            Save();
        }
    }

    void Save()
    {
        PlayerData tempData = new PlayerData();
        tempData.name = "a";
        tempData.x = 0;
        tempData.y = 0;

        playerData = new PlayerData[FloorContainer.transform.childCount];
        int childCounter = 0;
        //foreach (Transform child in FloorContainer.transform)
        for (int i = 0; i < FloorContainer.transform.childCount; i++)
        {
            playerData[i] = tempData;
        }
        for (int i = 0; i < FloorContainer.transform.childCount; i++)
        {
            playerData[i].name = FloorContainer.transform.GetChild(i).name; //child.name;
            playerData[i].x = FloorContainer.transform.GetChild(i).GetComponent<FloorValuesHolder>().x; //child.gameObject.GetComponent<FloorValuesHolder>().x;
            playerData[i].y = FloorContainer.transform.GetChild(i).GetComponent<FloorValuesHolder>().y; //child.gameObject.GetComponent<FloorValuesHolder>().y;
            //childCounter++;
        }

        string json = JsonUtility.ToJson(playerData);
        print("This is JSON " + json);
    }
}