60 mins
165 points
What you need:
  • Computer/laptop

Scratch Balloon Pop Game

For this lesson, we are going to create a game about clicking balloons that move around the game screen.

1 - Creating a Scratch project

Go to the Scratch website and create a new project and delete the cat sprite.

2 - Adding the balloon

Open up the sprite library and add in the balloon sprite.

3 - Creating more balloons

In this game we will be creating lots of clones of the balloon sprite so that we can try and pop them!

First, let's hide the balloon sprite and set it's size to 75%. To do it, add this code to the balloon sprite.

when green flag clicked set size to (75) % hide

Next, we want to keep creating clones every few seconds. To do this, we have to add a forever block to the previous code.

when green flag clicked set size to (75) % hide forever // add new code under here end

Inside the forever block, we can add the wait and the create clone block. This will handle the creation of clones every few seconds.

when green flag clicked set size to (75) % hide forever wait(5) seconds create clone of (myself v)

4 - Making the clones move

We want the clones to move around the game screen. 

First, we have to get the when I start as a clone block and we need to show the created clone. We can use the code below to our balloon sprite.

when I start as a clone show

Next, we want the the created clone to move around and bounce once it touches the edge of the screen. To do this, we can use the code below.

when I start as a clone show forever glide (3) secs to (random position v) if on edge, bounce

5 - Adding Scores and Timer

To make our game challenging, we have to add scores and timers.

To do this, we can go to our balloon sprite and add two variables and we name them Score and Time.

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Copyright Notice
This lesson is copyright of Coding Ireland. Unauthorised use, copying or distribution is not allowed.

Scratch is developed by the Lifelong Kindergarten Group at the MIT Media Lab. It is available for free at
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