A GDC seminar given by Tsutomu Kouno, director or LocoRoco, explored his process and goals in creating that PSP game. Like Miyamoto said earlier that day, Kouno wanted to make people smile. Speaking in Japanese, with us listening to a group of translators over a set of headphones, Kouno began with a personal history.
He described growing up making toys, saying he would show them to people to make them laugh. He felt that LocoRoco came from that history. He said, "I wanted to make a game that was easy to play, so that women and children, and people who have never played games before would be interested in playing it. ... I wanted to use AI to make people laugh. That's why I included actions like the LocoRoco stacking up."
See our gallery of LocoRoco design slides from the seminar.