How to play

Satellites orbit a central planet, and a new one arrives every few seconds. Your job is to keep every single one of them alive.

Drag from a satellite to fire its thruster — short drags are gentle, and the thruster is capped either way. Each satellite can only be nudged once per second.

Orbits decay, space nudges back, and the satellites pull on each other, which gets rude as the sky fills up.

The run ends the moment anything goes wrong: one satellite burns in the atmosphere, one escapes past the dashed edge, or two collide.

Scoring

• Your score is how many seconds the constellation survived — higher is better.
• One leaderboard, all-time. There is no partial credit for the satellites that were doing fine.

Tips

• The colors are triage: green is stable, yellow is drifting, red is doomed. Spend your attention on red and trust green to cope.
• Nudge along the direction of travel to raise an orbit and against it to lower one — sideways shoves mostly make ellipses, and ellipses make collisions.
• Fix things early with small taps. A satellite that needs a big correction is a satellite you ignored for thirty seconds.

Frequently asked questions

Why did my run end when most satellites were fine?

Orbit Keeper is a one-mistake game — a single burn-up, escape, or collision ends it. The wellbeing of the survivors is not consulted.

What's the collision failure called?

Kessler syndrome — one crash filling an orbit with debris. Here it just fills your screen with regret.

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