January 3, 1989
Been playing Super Mario 2. First time in ages I’ve been addicted to an arcade game. Several points worth noting:
- It took me hours of play to get through the first area; but having done it once, I can now zip through it reliably in minutes.
- I’m building up a repertoire of skills.
- There are certain things that it pays to do in the first area – like boost your life meter from 2 to 3 to 4, and collect an extra life – but you can also keep playing forever in the same area, if you like, without achieving anything.
New Year’s Resolution: Finish Prince of Persia. (Ship by June 30, 1989.)

You have analyzed other games really well. I’ve read books with the same theories which you are explaining in this article. You are smart with this things, really.