Simple Shooting | 2D | Bullets | Unity Game Engine

Gun2D.cs

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

public class Gun2D : MonoBehaviour
{
    public Transform bulletSpawnPoint;
    public GameObject bulletPrefab;
    public float bulletSpeed = 10;

    void Update()
    {
        if(Input.GetKeyDown(KeyCode.Space))
        {
            var bullet = Instantiate(bulletPrefab, bulletSpawnPoint.position, bulletSpawnPoint.rotation);
            bullet.GetComponent<Rigidbody2D>().velocity = bulletSpawnPoint.up * bulletSpeed;
        }
    }
}

Bullet.cs

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

public class Bullet : MonoBehaviour
{
    public float life = 3;

    void Awake()
    {
        Destroy(gameObject, life);
    }

    void OnCollisionEnter2D(Collision2D collision)
    {
        Destroy(collision.gameObject);
        Destroy(gameObject);
    }
}