Signal Grid
Rotate circuit nodes, route power from the source, and light every target on the board. Signal...
Gravity Rush
About Gravity Rush
Draw the path, solve the physics. Gravity Rush is a puzzle game where every line you sketch becomes a real physical surface — and a rolling ball must cross it to reach the glowing goal. Each level hands you a small number of strokes and asks you to plan a route through obstacles using angle, length, and placement. Short lines redirect; long lines cradle; angled lines convert falling momentum into horizontal motion. The puzzles are not about finding one right answer — they are about finding your answer from among many, under a stroke budget that forces creativity. Star ratings reward elegant solutions, and later levels chain multiple physics ideas into challenges that feel earned when you solve them. The game ships with 50 levels in five difficulty tiers, from tutorial puzzles to master-level challenges.
How to Play Gravity Rush
Controls
- Draw a line: Click and drag (desktop) or swipe (mobile) to sketch a solid line on screen.
- Lines are permanent: A drawn line cannot be erased or undone; use the restart button to clear the board and try the level again.
- Restart level: Use the restart button if your current plan is not working.
Objective
- Guide the ball into the glowing goal using gravity and your drawn lines.
- Stay within the stroke budget for the level — most levels allow only two or three lines.
- Stars depend on how few lines you use: finish within the gold line budget for three stars, the silver budget for two, and any completion earns one.
Line behavior
- Lines act as rigid surfaces — the ball rolls or bounces off them.
- Angled lines convert vertical drop into horizontal velocity.
- Long flat lines make long cradles; short lines act as precise nudges.
Tips & Strategy
- Plan before you draw. Lines cannot be erased, so study the level first and use the restart button to retry with a cleaner idea.
- Make every line count. Each level allows only a few strokes, so look for a line that both catches the ball and sends it where the next line needs it.
- Momentum is a tool. A tall falling arc hitting a 45-degree ramp can carry the ball much further than a flat surface.
- Watch for obstacles. Levels place angled bars and blocks in the ball's path — draw lines that route the ball around them or bounce it off them.
- Three stars hunt. The fewest-stroke solution is rarely the first one you find; return to old levels with new ideas.
The Story Behind Gravity Rush
Gravity Rush started with a deliberately awkward question: what would a physics puzzle look like if the player had to draw the puzzle, not just solve it? Most physics puzzles hand you a fixed toolbox; we wanted to see what happened when the toolbox was literally a pen. The first prototype had unlimited strokes, which was actively bad: with no limit, a player could draw walls, box the ball in, and reach the goal in seconds.
The stroke budget fixed it. Limiting strokes per level forced real thought into every line, and it created the secondary game of finding more elegant solutions. Three-star runs almost always use fewer strokes than a bare-pass run, so the game quietly rewards reconsidering each line rather than just any line that works. Passing a level is enough to move on, but the star rating and lines-used count on the results screen leave room to retry and find a cleaner solution.
Line physics sit on top of Three.js plus a small custom physics solver. Early builds had line collisions snapping to a pixel grid, which caused visible jitter on slow-moving balls. The current build interpolates collision surfaces across subframes, which costs a bit of CPU but eliminates the drift. Related intuitive-input physics work runs through Rope Snip — different inputs, same tension between an intuitive gesture and a precise simulation underneath.
Frequently Asked Questions
Is there only one right solution per level?
No — most levels have multiple valid paths. Three-star solutions tend to be elegant and use fewer strokes, but there is no single 'correct' way to solve a level.
What happens if I run out of strokes?
You can reset the level and try again. Strokes are a budget, not a hard fail — if your current plan is not working, restart the level and try a different set of lines.
Can I play Gravity Rush on mobile?
Yes. Drawing with a finger works the same as using a mouse, and the UI adapts to portrait phone screens automatically.
Do I need an account to save progress?
No. Progress and star ratings are saved locally in your browser automatically, so they stay on the device you play on.
Is Gravity Rush free to play?
Yes. Every level is free to play — no paywalls and no premium level unlocks.
