Enter the "How To Play" screen, then click the "Space Bar" icon 714 times. Shady's head will appear, then bounce around the screen and collect all of the power-up icons.Concept mode
Play five matches in Classic and/or Anniversary modes to unlock Concept mode.Challenge mode
Play fifteen matches in Classic, Anniversary, and/or Concept modes to unlock Challenge mode.Boss Rush mode
Successfully complete all challenges in Challenge mode to unlock Boss Rush mode.All challenges in Challenge mode
Score 1,000 points in the first challenge to immediately unlock all other challenges.