If you are up for a little challenge and $11,000 in cash and prizes does not sound bad to you, here is a challenge from Educational Testing Service (ETS).
http://etsgameschallenge.com/
From their site: "Video games and apps have enormous potential to fundamentally change standardized testing. Rethink the traditional math test"
Develop games in your browser. Powerful, performant & highly capable.
Looks interesting, appreciate the post :)
Edit: Looks like it is only open to US residents :/