Some of these (not all) have age restrictions. Some have cash prizes, some have other items. Compete for a chance to win, but also as a chance to try out something new.
1. March 22nd, one day, online coding challenges
http://www.codingame.com/kirk/
2. Build an AI for a racecar over two weeks, teams of up to 3, top six teams compete in Finland!
http://helloworldopen.com/
3. Warlight AI (strategy game like Risk), cash prizes
http://theaigames.com/competitions/warlight-ai-challenge
4. Create a HTML 5 game that also runs on mobile devices with touch. Cash prizes up to $2500
http://clay.io/gotgame
http://www.codingame.com/kirk/
2. Build an AI for a racecar over two weeks, teams of up to 3, top six teams compete in Finland!
http://helloworldopen.com/
3. Warlight AI (strategy game like Risk), cash prizes
http://theaigames.com/competitions/warlight-ai-challenge
4. Create a HTML 5 game that also runs on mobile devices with touch. Cash prizes up to $2500
http://clay.io/gotgame