I love this game - it's very difficult to stop playing - I'm desperate to "beat it". The easy mode is just a warm up really. The medium mode I probably win 50% of the time - there is an motor element to this as well - like rubbing your tummy and trying to pat your head at the same time. "Hard" mode - well that why I can't stop playing - I need to prove to myself it's not impossible. Simply brilliant!