And yourself some credit. — All games should have a Main Menu with a splash scene. In our game all we need is a cool graphic and a New Game button. The splash screen / Main Menu should be a scene on its own. …

Trigger with a key press — Your player is having an awesome time playing your 2D Space Shooter game. Eventually they loose all their lives. They would like to play again, so let’s give them this option. …

Lets Make it Flicker Too. — Now that we have run out of lives, it is time we tell the player the Game is Over. In order to add this text to our User Interface, we will need to add a text object. Select Canvas, right click and select UI, Text.

More UI Elements — Previously we added the player’s score on the screen. Now lets add how many lives the player has at any given moment. We will be using some sprites for this. In Sprites, UI, Lives, we have 4 life options, no_lives, One, Two and Three. In order to get the sprites…

Adding UI elements to your game — Getting UI elements on to your game like Score or Lives available or text boxes, etc. is quite simple in Unity. We have our player, enemies, lasers and powerups ready. Now we need to work on our interface. For our game to be more interesting, we need to have a…

Spawning The Powerups Randomly — Speedboost is only our second powerup, TripleShot was the first. In our SpawnManager script, we can see that we have hard coded the spawning of the TripleShot. We could do this for each powerup because we only have three, but imagine if you had 30 or 40 powerups in your…

For a better readability — When we need to compare the value of a variable we can use the if statement. If there are several possibilities depending on the value of the variable then we would use if else if statement. …

The more the better — A game without powerups is a very boring game. Then again if you only have one powerup it isn’t that great. So we make several powerups for our game, for example, in our case we will have a TripleShot, a SpeedBoost and a Shield. We already have the TripleShot powerup…

Determining How Long Powerup Effects Should Last — We have created our sprite animation. Now we need to make it appear in our game. To do this, lets go to our SpawnManager script. Notice we already have a spawning coroutine for our enamy gameObjects. So we have to make something similar for our powerup.