Use the right and left arrow keys on you computer if you are playing on a computer. Watch what happens when you get 20 points,and watch what happens when you lose your 3 lives. Have fun! :)
I used a YouTube video to help me understand what was going on. I used a bit of A.I. to fix my bugs. The YouTube video I used is called"how to make a catch game on scratch tutorial" by Scratch team.