well it doesn't really matter since you just have to play the game and see the walkthrough right next to the author's description. I bet you 10 shillings that's the exact same walkthrough he pasted here.
i won ... every level if you did and you press the claim your prizce there is a cat pushing piano stuff level 21 and 22 is that you need 2 windows. one on pong and one on pingfirst one has to be in ping second has to be in pong.level 11 you must press/type xcvbn level 24 and 25 is like omg!but level 25 type theend with no spaces level 24 type ofcourse then you won if you got all the levels if not go to the game walkthrorth(sorry i have bad speelings.)