The snowman starts at a small size. Use the left and right arrow keys to move the snowman back and forth to catch each of the snowflakes (which are different sizes). Every time the snowman catches a snowflake, he gets larger. However, if he misses the snowflake and it hits the ground, he gets smaller. You win when his size gets above 250%, and you lose when his size gets below 5%.
Create one snowflake, but randomly set the size for each clone. Create multiple costumes for the snowman so it looks like he's walking, and change his direction between left and right Use two different costumes for one sprite to show the "You Won" and "You Lost" pop-up message.