Destroy the Bullets

It is important to destroy the bullets after they leave the room, otherwise there gets to be more and more of them and the game has to try to remember where each one has gone to.  This will make the game slower and slower, so it's best to destroy any bullets that leave the room.

Double click objBullet to open its properties.

Click Add event.  Choose Other > Outside Room

Click the Main1 tab, and drag the Destroy Instance action to the actions panel.

You will not really notice any difference when you play the game.

Make an Explosion Appear When the Bullet Hits the Enemy

Double click to open the properties for the objEnemy

Click the collision event for objBullet and click the Main1 tab

Drag the 'Create Instance' action to the actions panel

Choose to create objExplode

Make sure that you tick Relative, otherwise the explosion will be created at (0,0) which is the top left of the screen!

Test your game to make sure you have explosions appearing in the right place.

Make the Clowns Advance Down the Screen

We need a little more excitement in our game, so we will change it so the clowns come towards the player.

Double click objEnemy to open its properties.

Add a Create Event

Drag the Set Vertical Speed to the actions panel

Set the speed to be 0.2

Add in Background Music

To add in background music, we first add a controller object.  Click create object

Name it objController.  It does not have a sprite because we don't want to see it in the game.

Add a create event for it.

From the Main1 tab, drag 'Play Sound' to the actions panel

Choose sndBackground, and set Loop to be true (so it keeps on playing)

Test your game.