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 $38.5K — a different platform, not this one.

TWINKLE STAR SPRITES

“TWINKLE STAR SPRITES ”, a competitive 2D top-down view scrolling shooter released on NEOGEO MVS in 1996, departs for new adventures on GOG! Master your shots, and aim for the magical Twinkle Star”! ARCADE Pick up your favorite character among the 9 cute characters available in “CHARACTER MODE”, and play until you clear the game. Choose “STORY MODE”, and accompany “Lord Ran” in her adventures in search of the lost “Twinkle Star”. Play locally in “VERSUS MODE” with a friend for intense and epic shooting battles! MULTIPLAYER Connect to GOG, and use the “INVITE A FRIEND” and “LOBBY” features to play against a buddy or challenge the best players worldwide! LEADERBOARDS Check your current rank & score in “TWINKLE STAR SPRITES” at any time, as well as those of your friends and other top shooters! SETTINGS Configure your language, video, and sound volume settings to your preference for the most pleasant “TWINKLE STAR SPRITES” experience ever.