Darkness is comming

In this dark fantasy game, you play as a warrior striving to hold back the encroaching Darkness. Despite your best efforts, hope is fleeting, and the odds are stacked against you. Luckily, Goddes is helping you, but even then, is it even possible to beat Darkness?

Credits:

Music: "Stay the Course" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 4.0 License
http://creativecommons.org/licenses/by/4.0/

As for the game jam, my code is compacted, but not into one line 

For that i set myself a golden rule: after ; you can't put anything apart from }

So, anyways, here are the codes:

Player Script:

using System.Collections;
using System.Collections.Generic;
using TMPro;
using UnityEditor;
using UnityEngine;
using UnityEngine.PlayerLoop;
using UnityEngine.SceneManagement;
using UnityEngine.UI;
public class PlayerScript : MonoBehaviour
{
    [SerializeField] float speed = 1.5f, atkSpeed = 2f, projSpeed = 2f, timer = 0f, immunityTimer = 0f, immunityTimerBase = 1.5f, deathTimer = 0f;
    public float hp = 30f, maxHP = 30f, damage = 2f, score = 0f;
    public GameObject magicBullet, HPBar, attackBar, darkScreen, resetButton, endText, scoreText;
    void Start() {darkScreen.SetActive(false);
        resetButton.SetActive(false);
        endText.SetActive(false);
        scoreText.SetActive(false);
        Time.timeScale = 1f;
        hp = maxHP;
        deathTimer = 0f;}
    void Update() {transform.position += new Vector3(Input.GetAxis("Horizontal") * speed * Time.deltaTime, Input.GetAxis("Vertical") * speed * Time.deltaTime, 0f);
        timer -= Time.deltaTime;
        immunityTimer -= Time.deltaTime;
        if (hp <= 0f) {deathTimer += Time.deltaTime;
            darkScreen.SetActive(true);
            darkScreen.GetComponent<Image>().color = new Color(0, 0, 0, deathTimer * 1.5f);
            if (deathTimer > 2f)
            {
                Time.timeScale = 0f;
                scoreText.SetActive(true);
                resetButton.SetActive(true);
                endText.SetActive(true);
                scoreText.GetComponent<TextMeshProUGUI>().text = "Score: " + score.ToString("F0"); }}
        else { HPBar.GetComponent<Slider>().value =hp / maxHP; }
        if (timer < 0f) { attackBar.SetActive(false);}
        else {attackBar.GetComponent<Slider>().value = (atkSpeed - timer) / atkSpeed;
            attackBar.SetActive(true);}
        if (Input.GetMouseButtonDown(0) && timer <= 0){timer = atkSpeed;
            GameObject missile = Instantiate(magicBullet, transform.position, Quaternion.FromToRotation(Vector3.up, (new Vector3(Camera.main.ScreenToWorldPoint(Input.mousePosition).x, Camera.main.ScreenToWorldPoint(Input.mousePosition).y, 0f) - transform.position).normalized));
            missile.transform.position += missile.transform.up * 1.5f;
            missile.GetComponent<Rigidbody2D>().AddForce(missile.transform.up * projSpeed, ForceMode2D.Impulse);}}
    public void dealDamage (float damage){if (immunityTimer < 0f) {immunityTimer = immunityTimerBase;
            hp -= damage;}}
    public void ResetTheGame (){Time.timeScale = 1f;
        SceneManager.LoadScene("Arena");}}

Enemies script:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class EnemyController : MonoBehaviour{public GameObject player;
    [SerializeField] float speed, rotation;
    [SerializeField] float damage, hp;
    void Update(){transform.position = Vector2.MoveTowards(transform.position, player.transform.position, speed * Time.deltaTime);
        transform.Rotate(new Vector3(0f, 0f, rotation * Time.deltaTime));}
    private void OnCollisionEnter2D(Collision2D collision){
        if (collision.gameObject.tag == "Player"){collision.gameObject.GetComponent<PlayerScript>().dealDamage(damage);}
        else if (collision.gameObject.tag == "Bullet"){Destroy(collision.gameObject);
            hp -= player.GetComponent<PlayerScript>().damage;
            if (hp < 0){
                player.GetComponent<PlayerScript>().score++;
            Destroy(gameObject);}}}}

Game Controller:

using System;
using System.Collections;
using System.Collections.Generic;
using Unity.Mathematics;
using UnityEngine;
public class BoardController : MonoBehaviour{[SerializeField] float EnemiesPerSecond = 1f, timer = 0f, SpeedUp = 0f, yHeight = 6f, xWidth = 10f;
    [SerializeField] GameObject player, enemiesAvaiable;
    private void Update(){timer -= Time.deltaTime;
        if (timer < 0f){while (timer < 0f){Vector3 spawnPos;
                if (UnityEngine.Random.Range(1, 3) == 1){if (UnityEngine.Random.Range(1, 3) == 1){spawnPos = new Vector3(-xWidth, UnityEngine.Random.Range(-yHeight, yHeight), 0f);}
                    else{spawnPos = new Vector3(xWidth, UnityEngine.Random.Range(-yHeight, yHeight), 0f);}
                }else{if (UnityEngine.Random.Range(1, 3) == 1){spawnPos = new Vector3(UnityEngine.Random.Range(-xWidth, xWidth), -yHeight, 0f);
                    }else{spawnPos = new Vector3(UnityEngine.Random.Range(-xWidth, xWidth), yHeight, 0f);}}
                GameObject enemy = Instantiate(enemiesAvaiable, spawnPos + player.transform.position, Quaternion.Euler(Vector3.zero));
                enemy.GetComponent<EnemyController>().player = player;
                timer += 1 / EnemiesPerSecond;}
            EnemiesPerSecond += SpeedUp;
            timer = 1 / EnemiesPerSecond;}}}