Space Shooter - Lives and Score

This is the forth part of the development of a Space Shooter game. In this tutorial we will add lives, scores and game over to our game.

Let's start with score.

Open the main timeline code and add this variable:

Now open the Bullet's code and add this:

This is the code we used before to know if a bullet hits an enemy, so we can put the score for killing an enemy there.

If you want the player to lose points for getting killed, just add _root.score -= PointsToLose to the code that checks if the player was killed.

The score is done; we just need to show the player his score.

To do that, select the Text Tool and draw it on the stage.

Write "Score:"

Now draw another Text box on the stage. Select this new Text box and change these properties:

Run the game and see how it works.

Now let's make our ship have lives. Add another variable in the main code:

And make these changes in the code that checks if the player crashed with an enemy:

Draw two text boxes again:

We can see the ship losing lives now, but nothing happens when it goes lower than zero.

To change that we tell the player when its game over. Create a new movie clip.

Write "Game Over" using the text tool and go back to the main timeline.

You will see something like this:

Add this to the Ship's code:

f the player's lives are over, we attach the "Game Over" MC and set its position.

ere we are removing the Ship MC, but first we use the function swapDepths(depth) because we placed this MC manually on stage, so we need to set a new depth before deleting it.

Try dying now... =)

The last tutorial will be about sound effects and a pause key. Then our game is finished.