Unity - Hilfe. Morgen Abgabe des W-Seminars

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

public class Spawner : MonoBehaviour {

    [System.Serializable]
    public class Wave{
        public Transform obstacle;
        public int amount;
        public float rate;
    }

    public Wave[] waves;
    private int nextWave = 0;

    public float delay = 5f;
    public float countdown = 5f;

    void Start(){
    }

    void Update(){
        if (countdown <= 0) {
            StartCoroutine (SpawnWave (waves [nextWave]));
        } else {
            countdown -= Time.deltaTime;
        }
    }

    IEnumerator SpawnWave(Wave _wave){
        for(int i = 0; i < _wave.amount; i++){
            Instantiate (_wave.obstacle, transform.position, transform.rotation);
            Debug.Log ("OBSTACLE SPAWNED");
            yield return new WaitForSeconds (1f/_wave.rate);
        }
            yield break;
    }
}

using System;
using UnityEngine;

public class Movement : MonoBehaviour{
    [RangeAttribute(1, 10)]
    public float velocity;

    private bool grounded;
    public LayerMask groundLayers;

    Animator anim;

    bool sliding = false;
    public float slideTime = 0f;
    public float slideMaxTime = 1.5f;

    void Update(){
        Move ();
    }

    void Move(){
        grounded = Physics2D.OverlapArea(new Vector2(transform.position.x - 0.5f, transform.position.y - 0.5f), new Vector2(transform.position.x + 0.5f, transform.position.y - 0.51f), groundLayers);

        if (Input.GetKeyDown (KeyCode.Space) && grounded && !sliding) {
            GetComponent<Rigidbody2D> ().velocity = Vector2.up * velocity;
        }    


        if (Input.GetKeyDown (KeyCode.DownArrow) && grounded && !sliding) {
            slideTime = 0f;
            anim.SetBool ("isSliding", true);
            gameObject.GetComponent<BoxCollider2D> ().enabled = false;
            sliding = true;
        }

        if (sliding) {
            slideTime += Time.deltaTime;
            if (slideTime > slideMaxTime) {
                sliding = false;
                anim.SetBool ("isSliding", false);
                gameObject.GetComponent<BoxCollider2D> ().enabled = true;
            }
        }
    }
}