I made a alpha version of this 2D shooter, Terminal2D, it's one level long by now and it's pretty simple but I'm new to game design and those are exercises, created with unity3d and blender for the 3D models, and ableton live for the music.
Please feel free to test it and throw some feedback, how will you improve it ? expand it ? etc ? what's working and what's not. Add your comment here or on my blog:http://www.mplabs.net
(requires unity3d plugin)