Prism (source) is a 2048 clone, using colors instead of numbers. It was created by Austin and myself in about a day, mostly for the purposes of getting to know each other better (this was before I joined Clay.io) as well as to show investors that we could produce content quickly. We have since changed course, and are focusing on the marketplace instead of being a first-party app developer, but it was still a valuable experience.
I have joined Clay.io as CTO/Co-Founder, after we raised a ~$500k seed round, and just 6 months after dropping out of high school and moving to San Francisco to join Nomic.
Read my guest post on Mozilla Hacks