You need 3 backgrounds for this game.
A title /start screen.
A game screen.
A game over screen.
Add this code to start the game.
Either have a button that you can click to start the game:
OR
Choose a key that will start your game:
OR
Next we are going to create hit boxes for all of our sprites.
Create a sprite name it "Player" and just draw a rectangle (for now). Make sure it is centered. Name the costume "Hitbox".
Create a sprite called "Platforms" We need some costumes to help with the game.
Go to the costumes tab and create 6 costumes. Give them the names above the pictures.
Ground
Platform 1
Platform 2
Platform 3
Big
Little
It should look like this when you are done.