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 $2.8M — a different platform, not this one.

Pikuniku

Pikuniku is an absurdly wonderful puzzle-exploration game that takes place in a strange but playful world where not everything is as happy as it seems. Help peculiar characters overcome struggles, uncover a deep state conspiracy, and start a fun little revolution in this delightful dystopian adventure! A Vibrant Adventure for All: Explore a colorful world at your own pace, help quirky characters with their unusual requests, and solve clever puzzles that will challenge players of all levels with a 4 - 5 hour campaign.​ Charming Cast: Meet a cast of memorable characters on your journey, each with their own problems and eccentricities to accommodate along the way. Cooperative Mode: Join up with family and friends for local multiplayer fun in custom cooperative levels and challenges.