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 $102K — a different platform, not this one.

Tetrobot and Co.

Tetrobot is the world's most popular and reliable robot, but he's not perfect. That's why I, Maya, have built him a microscopic little brother, Psychobot. Help me guide Psy through Tetrobot's cogs and circuits: by swallowing blocks of matter and spitting them out, we can repair anything. Learn how pipes, lasers, fans and other electronic devices work, learn how to alter the chemical properties of slime, and collect all the memory blocks that you find on the way. The owners of damaged Tetrobots all around the world rely on us because we are the only people who can repair their precious robots. Pure puzzle gameplay for those who like to give their minds a workout. Over 50 levels to play and even more secrets to unlock. Original music composed by Morusque (Blocks That Matter, Knytt Stories, Saira,). Find out what became of Tetrobot, Alexey, Markus and Maya, 15 years after "Blocks That Matter".