Hey everyone. I've had a game selling commercially - and quite successfully, for quite a while now, built on my open source game engine, Rokon.
I decided, due to commitments elsewhere and increasing competition - meaning I can't keep making updates to warrant a high-priced game, that I'd make it open source.
You can download the game to play on the marketplace, or download it from my engine's project page, here
. Be sure to read the README and LICENSE files.
It's very messy in places, but it might help you with some OpenGL