Dll-ка в Unity3D

using System.Collections;
using UnityEngine;
using UnityEngine.UI;
using LogicBalls;
using UnityEngine.EventSystems;
 
public class Program : MonoBehaviour
{
    Game game;
 
    // Start is called before the first frame update
    void Start()
    {
        game = new Game(9, ShowMyItem);
        game.Start();
        //StartCoroutine("Timer");
        StartCoroutine("Tick");
    }
 
    // Update is called once per frame
    void Update()
    {
 
    }
 
    public void OnClick()
    {
        //Debug.Log("Cliced");
        string name = EventSystem.current.currentSelectedGameObject.GetComponent<Button>().name;
        string nr = name.Replace("Button (","").Replace(")","");
        int xy = int.Parse(nr, 0);
        int x = xy % 9;
        int y = xy / 9;
        game.ClickBox(x, y);
    }
 
    private IEnumerator Tick()
    {
        while (true)
        {
            game.Step();
            yield return new WaitForSeconds(0.5f);
        }
    }
 
    public void ShowMyItem(Ball ball, Item item)
    {
        int nr = ball.y * 9 + ball.x;
        Image image = GameObject.Find("Button (" + nr + ")").GetComponent<Image>();
        Sprite sprite = GameObject.Find(GetSpriteName(ball.color, item)).GetComponent<SpriteRenderer>().sprite;
        image.sprite = sprite;
    }
 
    private string GetSpriteName(int color, Item item)
    {
        switch (item)
        {
            case Item.none: return "empty";
            case Item.ball: return color + "n";
            case Item.jump: return color + "b";
            case Item.next: return color + "s";
            case Item.path: return "path";
        }
        return "empty";
    }
}