Porting Unity Scripts

BattleUnit.cs

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

public class BattleUnit : MonoBehaviour {
    public GameObject fireCyrcle;
    public GameObject moveCyrcle;
    bool isSelected;
    GameObject fireZone;

	// Use this for initialization
	void Start () {
		
	}
	
	// Update is called once per frame
	void Update () {
		
	}

    void OnMouseDown()
    {
        Debug.Log("Mouse down");
        Debug.Log(transform.position);
        isSelected = !isSelected;
        if (isSelected)
        {
            fireZone = Instantiate(fireCyrcle, transform.position, transform.rotation);
            fireZone.transform.localScale = new Vector3(4, 4, 4);
            fireZone.transform.parent = gameObject.transform;
        }
        else
        {
            GameState.isUnitSelected = false;
            Destroy(fireZone);
        }
            

    }

    void OnMouseOver()
    {
        if(Input.GetMouseButtonDown(1)){
            Debug.Log("Right msouse down");
            Debug.Log(transform.position);
            isSelected = !isSelected;
            if (isSelected)
            {
                GameState.isUnitSelected = true;
                GameState.selectedUnit = gameObject;
                fireZone = Instantiate(moveCyrcle, transform.position, transform.rotation);
                fireZone.transform.localScale = new Vector3(10, 10, 10);
                fireZone.transform.parent = gameObject.transform;
            }
            else
            {
                GameState.isUnitSelected = false;
                Destroy(fireZone);
            }
                
        }
    }
}

ColorizeTile.cs

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

public class ColorizeTile : MonoBehaviour {

	// Use this for initialization
	void Start () {
        Debug.Log("Tile start");
    }
	
	// Update is called once per frame
	void Update () {
		
	}

    void OnMouseEnter()
    {
        Debug.Log("Mouse enter");
        SpriteRenderer renderer = GetComponent<SpriteRenderer>();//Get the renderer via GetComponent or have it cached previously
        renderer.color = new Color(0f, 1f, 1f, 1f);
    }
    void OnMouseExit()
    {
        Debug.Log("Mouse exit");
        SpriteRenderer renderer = GetComponent<SpriteRenderer>();//Get the renderer via GetComponent or have it cached previously
        renderer.color = new Color(1f, 1f, 1f, 1f);
    }
    //void OnMouseDrag()
    //{
    //    Debug.Log("Mouse drag");
    //    // SpriteRenderer renderer = GetComponent<SpriteRenderer>();//Get the renderer via GetComponent or have it cached previously
    //    // renderer.color = new Color(0f, 1f, 1f, 1f);
    //}

    void OnMouseDown()
    {
        Debug.Log("Mouse down");
        if(GameState.isUnitSelected)
        {
            Debug.Log("Transform obj");
            Debug.Log(GameState.selectedUnit);
            Vector3 selfPos = transform.position;
            Vector3 objPos = GameState.selectedUnit.transform.position;
            
            if (Vector3.Distance(selfPos, objPos) < GameState.moveDistance)
            {
                Transform tr = GameState.selectedUnit.transform;
                tr.position = new Vector3(selfPos.x, selfPos.y, objPos.z);
                objPos.x = selfPos.x;
                objPos.y = selfPos.y;
            }
            
        }
        // rigidbody.AddForce(-transform.forward * 500f);
        // rigidbody.useGravity = true;
    }
}

CreateGameField.cs

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

public class CreateGameField : MonoBehaviour
{
    public GameObject groundTile;
    // Use this for initialization
    void Start()
    {
        for (int i = 0; i < 10; i++)
        {
            for (int j = 0; j < 10; j++)
            {
                Instantiate(groundTile, new Vector3(i, j, 0), new Quaternion());
            }
        }
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
            RaycastHit hit;
            if (Physics.Raycast(ray, out hit))
            {
                Debug.Log("Name = " + hit.collider.name);
                Debug.Log("Tag = " + hit.collider.tag);
                Debug.Log("Hit Point = " + hit.point);
                Debug.Log("Object position = " + hit.collider.gameObject.transform.position);
                Debug.Log("--------------");

            }
        }
    }
}

GameState.cs

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

public static class GameState {
    public static GameObject selectedUnit;
    public static bool isUnitSelected;
    public static float moveDistance = 10;
}

TouchCamera.cs

// Just add this script to your camera. It doesn't need any configuration.

using UnityEngine;

public class TouchCamera : MonoBehaviour {
	Vector2?[] oldTouchPositions = {
		null,
		null
	};
	Vector2 oldTouchVector;
	float oldTouchDistance;

	void Update() {
		if (Input.touchCount == 0) {
			oldTouchPositions[0] = null;
			oldTouchPositions[1] = null;
		}
		else if (Input.touchCount == 1) {
			if (oldTouchPositions[0] == null || oldTouchPositions[1] != null) {
				oldTouchPositions[0] = Input.GetTouch(0).position;
				oldTouchPositions[1] = null;
			}
			else {
				Vector2 newTouchPosition = Input.GetTouch(0).position;
				
				transform.position += transform.TransformDirection((Vector3)((oldTouchPositions[0] - newTouchPosition) * GetComponent<Camera>().orthographicSize / GetComponent<Camera>().pixelHeight * 2f));
				
				oldTouchPositions[0] = newTouchPosition;
			}
		}
		else {
			if (oldTouchPositions[1] == null) {
				oldTouchPositions[0] = Input.GetTouch(0).position;
				oldTouchPositions[1] = Input.GetTouch(1).position;
				oldTouchVector = (Vector2)(oldTouchPositions[0] - oldTouchPositions[1]);
				oldTouchDistance = oldTouchVector.magnitude;
			}
			else {
				Vector2 screen = new Vector2(GetComponent<Camera>().pixelWidth, GetComponent<Camera>().pixelHeight);
				
				Vector2[] newTouchPositions = {
					Input.GetTouch(0).position,
					Input.GetTouch(1).position
				};
				Vector2 newTouchVector = newTouchPositions[0] - newTouchPositions[1];
				float newTouchDistance = newTouchVector.magnitude;

				transform.position += transform.TransformDirection((Vector3)((oldTouchPositions[0] + oldTouchPositions[1] - screen) * GetComponent<Camera>().orthographicSize / screen.y));
				transform.localRotation *= Quaternion.Euler(new Vector3(0, 0, Mathf.Asin(Mathf.Clamp((oldTouchVector.y * newTouchVector.x - oldTouchVector.x * newTouchVector.y) / oldTouchDistance / newTouchDistance, -1f, 1f)) / 0.0174532924f));
                GetComponent<Camera>().orthographicSize *= oldTouchDistance / newTouchDistance;
				transform.position -= transform.TransformDirection((newTouchPositions[0] + newTouchPositions[1] - screen) * GetComponent<Camera>().orthographicSize / screen.y);

				oldTouchPositions[0] = newTouchPositions[0];
				oldTouchPositions[1] = newTouchPositions[1];
				oldTouchVector = newTouchVector;
				oldTouchDistance = newTouchDistance;
			}
		}
	}
}