Gravity Flip

About Gravity Flip

Gravity Flip has exactly one input, which makes it easy to explain and hard to master. Pressing anything inverts the direction gravity pulls, sending you falling toward the ceiling instead of the floor. Obstacles are arranged so that surviving requires flipping at specific moments — not continuously, and not reactively. It belongs to the small family of games where the constraint of a single button is the design rather than a limitation of it.

How to play well

The mistake nearly everyone makes is flipping when they see a gap, which is already too late. Because you accelerate under gravity rather than moving at a constant speed, the flip has to happen before the obstacle, and how far before depends on how long you have been falling. A flip taken immediately after a previous one barely changes your position; a flip taken after a long fall swings you across the entire play area. The rhythm to learn is a series of small alternating flips that keep you near the centre, spending the large committed swings only where the layout actually demands one.

How it is built

Gravity is a single signed constant, and flipping negates it — the entire mechanic is one sign change, with the rest falling out of ordinary integration. Vertical position is advanced with velocity Verlet rather than naive Euler integration, which keeps the arc symmetrical: with Euler, a flip at the top of a rise and a flip at the bottom of a fall produce visibly different trajectories, and players feel that inconsistency as the controls being unreliable even when they cannot name it. The collision volume is deliberately slightly smaller than the sprite, a standard piece of arcade dishonesty that makes near misses read as skill rather than as the game being unfair.

Nothing is collected

This game follows the same rule as every tool on the site. There is no account, no leaderboard server and no analytics event carrying anything about how you played. Your best score is kept by your own browser and never leaves the device — clearing site data for this domain erases it, and nobody else ever had a copy.

It also works offline once loaded, because there is nothing to load from anywhere after the first visit. That is a side effect of the same design: a game that never talks to a server has nothing to be disconnected from.