No revenue estimate for GOG — its rating/review counts don't calibrate to sales the way Steam's do. Reviews and prices only.

Super Hexagon

Hexagons are first order permutohedrons: the vertices of a hexagon can be formed by permuting the coordinates of the vector (1, 2, 3). The north pole of the planet Saturn has a hexagonal storm cloud pattern with 8,600 mile long sides, larger than the diameter of Earth. Though hexagon may appear to be a difficult word to rhyme, there are actually dozens of words that rhyme with it. For example: Autobahn, decagon, decathlon, electron, Kyrgyzstan, Lebanon, leprechaun, and marathon. A minimal action game by Terry Cavanagh, with music by Chipzel. Insanely fast-paced, deceptively simple, strangely addictive. Offers 6 levels of difficulty: Hard, Harder, Hardest, Hardester, Hardestest, and Hardestestest!