Look at the list of pi digits. When you have memorized some, press space. That will hide the list and show a sprite. He will ask you to type in digits of pi. Type in some(you need the 3 and the decimal). He will tell you how many you got right until you got one wrong or it is all of the numbers you typed in(the more you got right, the longer it may take)(the 3 and the decimal count). Then, the list will reappear and you can press space when you are ready again.
Thank you so much JPB2012! He fixed the part of this that is most important, added some stuff, and made it work!