Just type in the number (1-13) that you think the tree is thinking of, then click enter. You have five tries, so don't feel bad when you lose. Try again until you win. It's not like it's a carnival game that you have to pay for. Keep in mind that every time you click the green flag, the secret number changes.
So I asked my sister what game I should make on scratch. She said "I spy an ornament". I thought "hey, that'd be cool to have a video game based off of our classic traditional Christmas game". So "Hey!" what are you waiting for? Go lose! Uh, I mean win! he he.