lots of the comments here are in the "make a free version of Sid Meier's Civilization" fashion. I'd say you should look at your game and tell us what makes it different and unique aside from being Open Source.
First off, an Open Source game shouldn't look bad. I know it's a work of love and not a AAA game, but aspects of the game art can perfectly be improved, I'm a supporter of the less is more trend, and I love games that can deliver even when they use colors and shadows instead of cheap textures.
First off, an Open Source game shouldn't look bad. I know it's a work of love and not a AAA game, but aspects of the game art can perfectly be improved, I'm a supporter of the less is more trend, and I love games that can deliver even when they use colors and shadows instead of cheap textures.