The three "secrets"
There are three secrets in the game, each will give you an additional life.
Secret 1: in the question where it asks which cloud is biggest move the cloud in the lower left corner to reveal the first secret.
Secret 2: There will be a question where it tells you to remember a blue fuzzy character, move him to reveal the second secret.
Secret 3: there will be a flashing lightbulb inbetween questions (afterwards it asks you how many times it flashed) move the flashing lightbulb to reveal the third and final secret.