Geometry: Black Ball

A black sphere that flips gravity mid-run is not something you see every day, and that's exactly the trick Geometry: Black Ball builds its whole run around. One second you're rolling along the floor, the next you're glued to the ceiling, and the obstacles never stop coming to remind you which way is currently down.

The minimalist look keeps your eyes exactly where they need to be: on the next hazard. This is a reaction game in the purest sense, closer in spirit to Obstacles Games than any slow-burn puzzle - you either read the pattern in time or you don't. It rewards the kind of twitchy, agility you build through repetition, run after run.

It plays free in the browser on desktop, Android, and iOS, no download needed. If you want another gravity-bending gauntlet once you've mastered this one, Deadly Descent scratches a similar itch. Solo, fast, and built for one player chasing one more clean run.

Guide the black sphere through each obstacle course without crashing, using gravity flips to switch between floor and ceiling as the level demands. Timing is everything - a flip a beat too early or late sends you straight into a wall or spike.

Controls are simple and built for quick reactions, so keep your inputs light and precise rather than mashing. Watch the pattern ahead rather than the ball itself; your reflexes will follow once your eyes are locked on what's coming.