No revenue estimate for GOG — its rating/review counts don't calibrate to sales the way Steam's do. The Steam version is estimated at $631.3K — a different platform, not this one.

Dustforce DX

Dustforce DX is a free update to the game, which includes 16 new maps, 109 community-made maps, a new music track, and bug fixes. It also has a redesigned overworld system that makes the game friendlier to newer players, and more exciting to veterans. The world is in dire need of a thorough cleaning. But it takes more than just a man to accomplish this mission. You’ve got to be a real superhero with a broom! As an acrobatic janitor, you are an adept force against dust and disorder. Leap and dash off walls and ceilings, and deftly traverse precarious environments. Cleanse each level swiftly and thoroughly to achieve mastery in this 2D sweep-'em-up platformer. Over 50 levels varying in difficulty from elegant exploration levels to intense challenges for hardcore players. Compete on the online leaderboard and instantly watch replays of every players' best attempts. Play against your friends with local multiplayer matches. Roam through a myriad of beautiful environments accompanied by an original soundtrack.