This year's Toronto Game Jam hosted its youngest participant to date: five-year-old Cassie Creighton, who along with her father Ryan developed the Flash adventure game Sissy's Magical Ponycorn Adventure in just three days.

Cassie voices the main character in the adventure. She also hand-drew all of the game's art assets, created its cast of characters, and designed some of the puzzles. Not bad for a first-timer!

Father Ryan documents the experience his blog, noting that Cassie's professional demeanor and dedicated work ethic paved the way for other young creators. The game itself, by the way, is every bit as cute as you'd expect, and then some. Give it a shot!

[via @mathewkumar]