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Planet Merge game artwork

Planet Merge

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Small worlds, bigger orbits.

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Small worlds, bigger orbits.

4.7711 plays

Planet Merge is a physics merge puzzle in orbit. Drop planets into the field, let matching worlds touch, and build your way up to the largest one.

Controls

Aim and drop: Drag anywhere on the field and release; Start a run: The play control on the tutorial panel

On a phone

The circular field fits a 390-pixel-wide phone without side scrolling, and dragging with a finger works well. A slow release is easier to aim than a quick one.

About Planet Merge

Planet Merge takes the drop-and-combine idea into orbit. The tutorial states the rule plainly: drag anywhere on the field, release to launch the planet, and two worlds of the same size become one larger world when they touch. The progression runs from the smallest body to the largest, and the panel beside the field shows which planet is coming next. Because the container is a circle rather than a box, the walls curve, and a planet that settles near the rim can roll back toward the middle long after you released it.

How the game works

Every drop changes the shape of everything already resting in the field. Two small worlds that touch merge into one heavier body, which then presses down on whatever sits beneath it. That chain is the whole game: a good drop does not just clear space, it moves the pile. The score rises with each merge and the best result is kept beside it, so a session has a target. The run ends when the field fills past the line at the top, which usually happens after a few careless drops near the edge rather than one obvious mistake.

How to play

Open the player and press play, then read the tutorial panel once: it explains that a drag anywhere on the field aims the drop. Move the pointer to the column you want and release. Let the planet fall and settle before deciding the next one. Watch the next-planet indicator so you can prepare a landing spot for it. Keep the larger worlds low and central, and avoid stacking small ones against the curved wall where they roll unpredictably.

Practical tips

  • Keep the biggest planets near the bottom centre, where the pile is most stable.
  • Read the next-planet indicator before every drop so you can prepare space for it.
  • Two worlds merge only when they are the same size; a near miss just costs height.
  • Avoid leaving small planets against the curved wall, where they roll back into the pile.
  • A merge near the bottom lifts everything above it, so build from the floor upward.

Frequently asked questions

How do you play Planet Merge?

Drag anywhere on the field to aim and release to drop a planet. When two planets of the same size touch, they merge into the next larger world.

What ends a run?

The run finishes when the pile rises past the line at the top of the circular field.

Is there a target to beat?

The panel shows the current score next to the best result recorded for the session, so every run has a number to chase.

Why does the field look circular?

The container is a curved bowl rather than a box, which is why planets near the rim can roll back toward the centre.

What is the next indicator for?

It shows the size of the planet that is about to drop, so you can decide where it should land before you release it.

Guide written from playing this build on 2026-09-18. Game reference ↗

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