If you haven't seen the 7 day roguelike challenge that happens every March and you should check it out!
This year I'm part of a team building a game based on the battlecode api. You control one character and have to fight harder and harder levels. (Think of it as a good intro to things like Direction, MapLocation, PlayerController, etc..).
We'll be updating things a lot in the coming week but there is a (very basic) tutorial ready to go! We will need beta testers through the week and would very much appreciate any feedback you can give!
RAID: Rogue AI Dungeon: http://bovard.github.io/raid/