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In this add-on, add a losing condition to your game to make it more challenging and fun.

You'll use a variable to keep track of the number of lives.

If it reaches zero, you're done.

Make the variable first.

Call it lives.

Drag out a change variable block and type in negative one.

Think about how many lives a player should start with in your game then get a set variable block, put it above the motion loop and type that number into the block.

That will set the number of lives at the start of the game.

This example will use a value of five.

Next, use an event block to determine when you lose a life.

Use when I receive.

When you click the drop-down, you'll see that there's already a message called lose a life.

You'll broadcast the message that will trigger this event.

Snap the change variable block below it.

Click the stack to test and the value in the variable display decreases.

But how does the program know you've lost?

You need a conditional.

Put an if-else block at the bottom of the new stack.

From the operators menu get an equal-to block.

Then put the lives variable in the first blank.

Type in zero in the second blank.

If lives reaches zero, the game is over.

Next, drag out a stop block and snap it into the then part.

Select other scripts and sprites in the drop-down.

This keeps the sprite from doing anything weird while the program tells the user, it's game over.

Below it, snap another one.

Keep all selected.

Between these two blocks, create some game over code.

Go ahead and get creative here about how the program should tell the player they've lost and the game has ended.

Change the backdrop, play a sound, or do some other fun action.

If it's not game over and the sprite just lost one life, reset the sprite.

In the else portion of the if-else block use a go-to block like the one on top of the motion loop and set both of the speeds back to zero.

The hero loses a life when it falls through the cracks or hits a bug.

In a motion loop, place another if block.

Snap in a touching block.

In the drop-down menu, pick edge.

That's for when the hero falls in a hole and hits the edge of the stage.

If you click on the bug sprite you'll see this third stack already broadcasts the lose a life message.

So you don't have to worry about writing that code for the bug.

Then broadcast the new lose a life message inside this if block.

Test it out.

Lose some lives and see if the game works the way you expect.

If so, congratulations.

Now, it's your turn.

Make a lives variable.

Set the variable to the number of lives at the start of the game.

Decrease it by one every time the hero hits a bug or the edge of the stage.

If the lives variable reaches zero, tell the user it's game over.

Choose an Add-On

Game Over

Give your hero a set number of lives.


Program your hero to shoot lasers to vanquish the evil bugs.


Add a power pellet to make the hero jump higher.

Falling Rocks

Add a falling obstacle to your game.


The terrain of your game will change to move up and down.

Follower Friend

Add a cute buddy who follows your hero around.


  1. Choose an add-on, and click "watch" to learn how to customize your project.
  2. When you finish, come back to the add-ons screen and try another add-on!