Getting ready: Don't press the green flag at the start. First, use the up and down arrows to change colours. When you're ready, press the green flag. You're gonna be asked are you ready (Don't put any full stops at the end of your answer!). Playing the game: Move the cursor around the screen. Collect the dots. If you collect a green dot, you will get a point; if it's red, you lose a point. If you have -5 points, you lose; if you collect 150 points, you win!
Check out this studio for more projects: https://scratch.mit.edu/studios/3631414/