Watch the video.
You will need:
- A player sprite. In these examples, I've used the Scratch cat sprite that you get when you start a new project. Obviously you will want one that suits your game idea. Either pick one from the built in sprites or draw one of your own.
- Two variables for 'this sprite only': one called 'gravity', the other called 'speed'.
- A stage backdrop for the first level. Click the stage design icon, on the left of the Sprites area and use the drawing tools to make a level using different colours. Keep to just a few colours to start with.