int count = 100; //кол-во
float rad = 20; //радиус

void Start () {
	for (int i = 0; i < count; i++) {
		GameObject newObj = Instantiate (prefab.gameObject);
		Vector3 newPos = transform.position;
	
		float step = (Math.PI * 2) / count; // отступ
		newPos.x = centerX + Math.sin (step * i) * rad; // по оси X
		newPos.z = centerZ + Math.cos (step * i ) * rad; // по оси Z
		newPos.y = 0; // по оси Y - тобиш высота
	
		newObj.transform.position = newPos;
	}
}

Вы понимаете, как работает ваша сериализация. И если будете ловить какие-то баги, то понимаете, как ее исправить, чего не скажешь о какой-то либе, начинку который вы не знаете

public class SpawnBombs : MonoBehaviour {
	...
	float timer = 1.2f;
	...
	IEnumerator Spawn ()
	{
		...
		timer -= 0.2f;
		yield return new WaitForSeconds (timer);
	}
}

 void OnCollisionEnter()
    {
        Jumping = false;
    }

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

public class playerController : MonoBehaviour {

	public float VertImp;
	Rigidbody2D rb;

	if (grounted)
	{
		rb.AddForce(Vector2.up * strenght);
	}

	void Start () {
		rb = GetComponent<Rigidbody2D> ();
	}

	void FixedUpdate () {
		if (Input.tochCount > 0) {
			rb.AddForce (new Vector2 (0, VertImp), ForceMode2D.Impulse);
			foreach(Touch t in Input.touches)
		}
	}
}

        if (Input.touchCount > 0)
        {

            foreach(Touch t in Input.touches)
            {

                if (grounted)
                {
                    rb.AddForce(Vector2.up * strenght);
                }

            }


        }

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

public class playerController : MonoBehaviour {

	public float VertImp;
	RigidBody2D rb;

	void Start () {
		rb = GetComponent<RigitBody2D> ();
	}

	void Update () {
		if (Input.toches ()) {
			RigitBody.AddForce (new Vector2 (0, VertImp), ForceMode2D.impulse);
		}
	}
}

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

public class playerController : MonoBehaviour {

	public float VertImp;
	RigidBody2D rb;

	void Start () {
		rb = GetComponent<RigidBody2D> ();
	}

	void FixedUpdate () {
		if (Input.toches ()) {
			rb.AddForce (new Vector2 (0, VertImp), ForceMode2D.impulse);
		}
	}
}

GameObject y_gameObject;

public void PlaySound(int y_soundNum)
{
	if(y_gameObject) Destroy(y_gameObject );
 y_gameObject = Instantiate(y_sfx, Vector3.zero, Quaternion.identity) as GameObject;
AudioSource y_audioSource = y_gameObject.GetComponent<AudioSource>();
y_audioSource.clip = y_audioClips[y_soundNum];
y_audioSource.Play();
Destroy(y_gameObject, y_audioClips[y_soundNum].length);
}