From Monday 1st Feb until March 11th we're running a game making competition at PlayCanvas. The theme is Rockets! Robots! UFOs! and we've supplied 3D models of each for the competition. First prize is £2000 (~$2900). It's a great opportunity to try a new engine or try out a game idea and win a prize.
All the info is here: http://blog.playcanvas.com/playhack-with-playjam-starts-today/