https://github.com/TerryCavanagh/VVVVVV/blob/master/LICENSE....
If Terry is reading this, please correct your article. The correct terminology is important! Open source is defined by the OSD, which this license doesn't qualify for:
Kudos for releasing your game's source, though!
Edit: I sent Terry an email and he agreed to change it <3 Thank you!
Edit 2: Ethan Lee worked on this! Ethan Lee is an awesome person. Ethan is probably the single biggest contributor to gaming on Linux, and he's always worked in the background. Thanks Ethan, you rock, and deserve more credit.