A while ago we had a “make a Space Invaders clone in a weekend” challenge on the Irrlicht forums. Having written lots of arcade games over the years I decided to try something different: an Invaders clone with a cylindrical coordinate system, mapped onto a circle. The result was a fun game:
As usual it contains no sounds, also due to its hurried nature the design is really awful. Someday I might refactor it and make the source code something to be proud of, but no promises here! You can grab a Windows binary if you just want to play it, which will be a lot more fun that reading the source.