keep-everything-alive/Assets/Scripts/Microgame_YourShip/SpawnInArea.cs

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

public class SpawnInArea : MonoBehaviour
{
    public GameObject instantiate;
    public Vector2 min;
    public Vector2 max;
    public int multiplier;

    private GameController gameController;

    private void Awake() {
        gameController = GameObject.FindGameObjectWithTag("GameController").GetComponent<GameController>();
    }

    private void Start()
    {
        for(int i = 0; i < gameController.Difficulty * multiplier; i++) {
            Instantiate(instantiate, new Vector2(Random.Range(min.x, max.x), Random.Range(min.y, max.y)), Quaternion.identity, transform);
        }
    }

}