I am taking a Digital Game-Based Learning course this semester, and so far it has been really interesting.  We look at the ways that games can provide great learning opportunities. For a project, I had to create my own game.  I had previously created a non-educational game in another class, so I built off of that one for my educational game.  Play both games at the links below.

Non educational game, "When Hippos Fly" : http://scratch.mit.edu/projects/FuzzyTurtles/2094222'

Educational game, "Hippos in Outer Space: A Math Adventure" : http://scratch.mit.edu/projects/FuzzyTurtles/2311162