The Second Annual National Stem Video Game Challenge opened yesterday and closes 3/12. (perfect for RIT students on a winter quarter schedule)
Students from middle school-grad school can enter, as can K-12 school educators either in formal schools or in after-school/weekend youth programs (No college profs though, shuckins) Kids get prizes and small awards, college students and educators split 30K and 40K awards respectively.
Scratch is an approved platform FOSS people! I also pinged them to see if straight web tech such as HTML5, CSS and the rest of the usual suspects are acceptable and they gave me the thumbs up.