Gravity Slingshot simulation
Free gravity puzzle game in your browser. Drag to launch a probe, use planets, moons and black holes for gravity assists, and reach the target in as few launches as possible. 15 levels plus a daily puzzle.
What you’re looking at
Gravity Slingshot is a physics puzzle game built on Newton's law of gravitation. Your probe is pulled by every planet, star and black hole on screen, so the straight line is rarely the right shot. You win by bending the path — the same gravity-assist technique NASA used to send Voyager past Jupiter and Saturn. Every level is deterministic and proven solvable, and the daily puzzle is the same for every player.
How to use it
- Drag backwards from anywhere on the canvas and release to launch the probe — the further you pull, the faster it goes.
- Watch the dotted preview: it shows where gravity will bend your path for the first moments of flight.
- Reach the glowing ring. One launch earns three stars, two launches earn two, more earn one.
- Clear a level to unlock the next, or try the daily puzzle — the same for everyone each day.
Questions
What is a gravity assist?
A gravity assist (or slingshot) uses a planet's gravity to change a spacecraft's speed and direction without using fuel. Voyager 2 used gravity assists at Jupiter, Saturn and Uranus to reach Neptune.
Is every level solvable?
Yes. Each level, and each day's daily puzzle, is checked by a solver that simulates thousands of launch angles and strengths and only accepts levels where some shots reach the target.
Why doesn't the probe go straight?
Every body pulls on the probe with a force that grows as it gets closer (inverse-square law), so its path curves toward planets, stars and especially black holes.