Last semester, we worked on a “path based tower defense” game for the iPhone. It’s going to get finished next semester, but anyhow, here’s a work in progress video capture:
In case somebody doesn’t know what the goal of a tower defense game is: you must not let the monsters get under your bed…kill them as cruel as possible 
I’ll post my experiences of this whole process as soon as time allows!
<3 <3 these munsters are too cute!