2D Galaxy Shooter: Enemies Fire Back! Time to Escape!

It was unexpected! We were piloting sector-z894, and they started firing back at us! We had no choice but to escape!

So the enemies can fire back at us. And we now have a functional “Escape” key if we want to quit the application or restart the scene.

Having the enemies shoot took some trial and error.

I started implementing the enemy shooting logic in a coroutine! It worked at the end, but it was long and messy. I wanted something cleaner. So I went with the idea of a cool-down system. I wrote about it here if you are interested in reading it.

if(Time.time > _canFire)
_fireRate = Random.Range(3f, 6f);
_canFire = Time.time + _fireRate;
var enemeyLaser = Instantiate(_laserPrefab, transform.position, Quaternion.identity); Projectile[] lasers = enemeyLaser.GetComponentsInChildren<Projectile>(); for (int i = 0; i < lasers.Length; i++)

There are many ways to go about it. That is why I decided to go with the coroutine route at first. But sometimes it’s better off to stick with something you know!

When I instantiate the laser prefab and cache it to the variable enemyLaser, I go right ahead to access the laser’s projectile script. This will enable me to call a function that will enable the projectile to be identified as the enemy.

With the enemy able to shoot, I had to refactor and modularize the projectile script. The script was meant to shoot upwards. Now it is modularized so that the enemies can shoot downwards.

private void Update()
if (!_isEnemyLaser)

I have also implemented a Pause Menu when hitting the escape key. The pause menu will pop up, and we can either choose to restart the scene or quit the application.

It has been a cool ride so far! The next article will be about how to deploy a game on PC/MAC and web GL!

Thank you for your time!



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Gabriel Perez

Gabriel Perez


Hello everyone, My name is Gabriel Perez, I am a Unity Developer and a creator who is always learning and experimenting.