Activity Checklist

• Start a new Scratch project, and delete the cat sprite so that your project is empty. You can find the online Scratch editor at jumpto.cc/scratch-new.

• For this project, you should have a ‘Project Resources’ folder, containing all of the images you’ll need. Make sure that you can find this folder, and ask your club leader if you can’t find it.

  

• Add the image ‘room1.png’ as a new stage backdrop, and the image ‘player.png’ as a new sprite. If you don’t have these images you can draw them yourself! Here’s how your project should look:

  

• Let’s use the arrow keys to move the player around. When the player presses the up arrow, you want the player to move up, by changing it’s y-coordinate. Add this code to the player sprite:

      when flag clicked
      forever
          if <key [up arrow v] pressed? > then
              change y by (2)
          end
      end

• Test out your player by clicking the flag and then holding down the up arrow. Does your player move up?

  

• To move the player to the left, you need to add another if block to your player, which changes the x-coordinate:

      when flag clicked
      forever
          if <key [up arrow v] pressed? > then
              change y by (2)
          end
          if <key [left arrow v] pressed? > then
              change x by (-2)
          end
      end

Activity Checklist

• Add 2 more backdrops to your stage (‘room2.png’ and ‘room3.png’), so that you have 3 backdrops in total. Make sure that they are in the right order - this will help you later.

  

• You’ll need a new variable called room, to keep track of what room the player is in.

  

• When the player touches the orange door in the first room, the next backdrop should be displayed, and the player should move back to the left side of the stage. Here’s the code you’ll need - it should go inside the player’s forever loop:

      if < touching color [#F2A24A] > then
          switch backdrop to [next backdrop v]
          go to x: (-200) y: (0)
          change [room v] by (1)
      end

• Add this code to the start of your player code (before the forever loop, to make sure that everything is reset when the flag is clicked:

      set [room v] to (1)
      go to x: (-200) y: (0)
      switch backdrop to [room1 v]

• Click the flag and move your player over the orange door. Does your player move to the next screen? Does the room variable change to 2?

  

Activity Checklist

• Upload the image ‘sign.png’ as a new sprite, and rename the sprite ‘welcome sign’.

  

• This sign will only be visible in room 1, so let’s add some code to the sign to make sure that this happens:

      when flag clicked
      forever
          if < (room) = [1] > then
              show
          else
              hide
          end
      end

• Test your sign by moving between rooms. Your sign should only be visible in room 1.

  

• A sign isn’t much good if it doesn’t say anything! Let’s add some more code (in another separate block) to display a message if the sign is touching the player:

      when flag clicked
      forever
          if < touching [player v]? > then
              say [Welcome! Can you get to the treasure?]
          else
              say []
          end
      end

• Test out your sign, and you should see a message when the player touches it.

  

Activity Checklist

• Add in a new person sprite, using the image ‘person.png’.

  

• Add in this code, so that the person talks to your player. This code is very similar to the code you added to your sign:

      when flag clicked
      go to x: (-200) y: (0)
      forever
          if < touching [player v]? > then
              say [Did you know that you can go through orange and yellow doors?]
          else
              say []
          end
      end

• You could also allow your player to move, by using these two blocks:

      move (1) steps
      if on edge, bounce

  Your player will act differently, depending on whether you place this code inside the forever loop or the if block. Try both and see which you prefer.

  

• Have you noticed that your person flips upside-down. To stop this, click the sprite’s information icon (i), and click the dot to fix to rotation style.

  

Activity Checklist

• Add a new variable valled coins to your project.

• Add a new ‘coin’ sprite to your project.

• Add code to your coins, so that they only appear in room 1.

• Add code to your coin sprite, to add 3 to your coins once they’ve been picked up:

      when flag clicked
      wait until <touching [player v]?>
      change [coins v] by (3)
      stop [other scripts in sprite v]
      hide

  The code stop other scripts in sprite is needed so that the coins stop being displayed in room 1 once they’ve been collected.

• You’ll also need to add code to set your coins variable to 0 at the start of your game.

• Test your project - collecting your coins should change your score to 3

Activity Checklist

• Create a new sprite from your ‘key-blue.png’ image. Switch your stage to backdrop 3, and place the key somewhere difficult to reach!

  

• Make sure that your key is only visible in room 3.

• Create a new list variable called inventory. This will be where you store all of the items your player collects.

• The code for collecting the key is very similar to the code for collecting coins. The difference is that you add the key to your inventory.

      when flag clicked
      wait until <touching [player v]?>
      add [blue key] to [inventory v]
      stop [other scripts in sprite v]
      hide

• Test out your key, to see if you can collect it, and add it to your inventory. Remember to add code to your stage to empty your inventory at the start.

      delete (all v) of [inventory v]

• Create a new sprite from your ‘door-blue.png’ image, and place your blue door across the gap in the 2 walls.

  

• Add code to your door, so that it is only visible in room 3.

• You’ll need to hide your blue door to allow your player to pass once you have the blue key in your inventory.

      when flag clicked
      wait until <[inventory v] contains [blue key]>
      stop [other scripts in sprite v]
      hide

• Test out your project, and see if you can collect the blue key to open the door!