Be prepared for lots of poor copies/variants of your game to appear shortly after you let your source code out. Script kiddies find it far easier to butcher something that works than to write their own thing from scratch.
You might want to anonymize your source code before you release it, so the crappy games don't come up with your name on them if the script kiddies haven't realized they should update it. Considering the stupid things some people may do with it, you could end up with a lot of the wrong sort of attention.