using UnityEngine;

public class Coin2D : MonoBehaviour
{
    public UnityEngine.UI.Text t1;
    public string text = "Coins: ";
    public static int count = 0;
    bool was = false;  // doesn't work twice

    void OnTriggerEnter2D(Collider2D other)
    {
        if (other.tag == "Player" && was == false)
        {
            count++;
            was = true;
            t1.text = text + count;
            Destroy(gameObject);
        }
    }
}