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 $457.7K — a different platform, not this one.

Wizordum

Wizordum Demo is available here The Ancient Seal of Terrabruma has shattered, unleashing the forces of Chaos once more. As one of the last Mages of Wizordum sanctuary, you must embark on a quest to find the source of this corruption and push the Chaos back before they consume the kingdom in a speedrun-friendly fantasy FPS tearing a page from the spellbooks of ‘90s fantasy FPS classics like Hexen and Heretic.  KEY FEATURES A vast arsenal of magic weapons & items Search for secret places filled with treasures Solve puzzles and avoid traps Embark on a single-player campaign to find the source of Chaos, traveling from the Town of Grimbrook through swamps over the snowy mountains and beyond. Collect bonus items and beat the hardest difficulty levels to climb to the top of the leaderboards Beat challenges at each level Compete online for the best time Create and share custom levels, all from inside the game LEVEL EDITOR Design and download custom adventures or full-fledged episodes with the in-game level editor.