Christopher Hernandez created a video game out of paper. He drew characters, painstakingly cut them out, then arranged them on his bedroom floor for his younger brother to pretend to play.
He didn't have a computer. He had never heard of someone making a living as a video-game designer.
A little more than a decade later, he is in a college classroom, showing off a game he spent two years making. It's "Yoshi's Isle, Sonic Style" - a combination of two popular games from the 1990s.
"Now, my dream job can come true," he says.