An excellent game where the designer/programmer doesn't let things get in the way of building is Aurora 4x [1] (not really a small game anymore). Only runs on windows, doesn't even have modifiable window sizes. For users that have period separators instead of commas a bunch of the text is cut off. It's a fantastic game that is purely what the creator wants and plays and is nothing more, and it has a great community behind it. It is purely a work of passion by the creator.