GGJ_2020/Assets/Scripts/BlackHole.cs

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

public class BlackHole : MonoBehaviour
{

    [SerializeField]
    private float Force = 5;

    private void OnTriggerStay(Collider other)
    {
        var horse = other.GetComponent<PlayerController>();

        if (horse != null)
        {
            Vector3 direction = horse.transform.position - transform.position;
            horse.AddForce(direction.normalized * Force);
        }
    }
}