This is an ongoing project
As of now, I still need to implement input handling and hitboxes/collision detection, but it's not terribly far from being complete for Linux. I have plans to port it to Windows and OSX in the future, as well as plans to write a framework for writing games with it.
As the engine itself is incomplete and is a work-in-progress, these screen shots may be outdated.
There's a video of the engine in action available on YouTube