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 $26.5K — a different platform, not this one.

Wildcat Gun Machine

Wildcat Gun Machine is an explosion roller coaster ride! Enter a bullet hell dungeon crawler where you take on hordes of disgusting flesh beasts with a wide variety of guns, giant mech robots, and cute kittens. Explore sprawling maze-like dungeons and liberate giant mech robots from demonic elder gods. Enemy encounters are challenging and specifically designed - not randomized - to provide difficult combat puzzles. Kill-die-learn-repeat! Over 40 gun types to choose from. Each has their own unique features like auto-aim bullets, long-range laser beams or exploding rounds with a huge blast radius. Super abilities that disintegrate everything on the screen! Character upgrades to suit the player’s gameplay style. Players wanting a more forgiving difficulty can increase the times they’re able to respawn, while speedrunners can upgrade their movement speed and improve their dash skill. Features Bullet Hell shooter Over 40 gun types Skill upgrades to suit your playstyle Epic set-piece boss battles Unique 2D art style Monster closet combat puzzles Hand crafted, consistent experience