Press the green flag, and then the play triangle. It will do everything for you until you fall, so just answer the question. After you fall, use the right and left arrow keys to move and space to jump to collect gems. After you reach 15 gems, you get to move on and go back up! Have fun!
There were a few glitches for me, but I can't help it if some of my sprites don't respond to the programming block "hide". :) Sorry if the arrow and gems won't disappear.