Planet Merge
Merge planets, build a sun
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Planet Merge: Merge planets, build a sun
Planet Merge is a physics puzzle where you aim and launch small planets into a crowded play area, fusing two identical worlds into the next stage up. Ten different planets are chained together in one long upgrade ladder, so every clean merge pushes you measurably closer to the final goal: an actual Sun sitting in the middle of your board. It plays in a browser tab with one mouse button, installs nothing, and starts on the first click.
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Did You Know?
Planet Merge's ladder ends with the Sun rather than starting with it, which means the most familiar object in the sky is the hardest thing in the game to build: it only appears after nine separate merge generations have been stacked in one run.
Key Features
Why You'll Love It
If you're a fan of elegant puzzle games, a good brain workout, and the sheer satisfaction of solving a tricky problem, Planet Merge is tailor-made for you. It's perfect for those moments when you want to unwind with a mentally stimulating activity, offering a refreshing blend of challenge and accessibility. The gradual difficulty curve ensures that you're always learning and growing, making every solved puzzle feel like a true victory.
How to Play Planet Merge
Click anywhere in the play area to drop the planet you are holding, using the mouse to line up the shot first. When two identical planets touch, they instantly combine into the next larger planet, and that new body stays on the board as a fresh obstacle to aim around. Keep merging upward through ten sizes: if the stack creeps past the top edge or a large planet gets pushed out of bounds, the run is over and you start fresh with a new score to beat.
Disclaimer: These are the standard controls for this type of game on PC Browser with Keyboard/Mouse. The actual controls may be slightly different.
| Action / Purpose | Key(s) / Gesture |
|---|---|
| Move the mouse | aim |
| click | launch the planet |
| and let gravity carry it into a matching planet. | |
Tips & Tricks
Drop small planets near the middle of the board early. Edge-dropping feels safe but crowds your corners first, and corners are exactly where you need room once big planets start forming
Bank two identical mid-tier planets side by side rather than merging them instantly. A pre-built pair near the center is a free upgrade the moment a third one appears
Aim at gaps not planets. The gravity pull means a shot that starts clean often curves, so give every launch a little room and let the physics do the final approach
Stop dropping when the stack gets tall. The board does not punish patience, so wait for a planet that fits an existing hole instead of forcing a launch onto the pile
Why Play Here?
One click, zero learning curve
No tutorial, no keys, no download queue. The first planet drops the moment you move a mouse.
Short-run format that respects a break
Runs last minutes, not hours. Perfect for a lunch break or a slow browser tab between tasks.
Physics that reward aim
Gravity bending a shot into a perfect merge is the whole game, and it lands every time you set it up.
Real progression every session
The planet ladder is fixed and visible, so you can measure yourself improving rather than guessing.
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Frequently Asked Questions
Discuss: Planet Merge
Did not expect a browser game to hook me this fast. The gravity bending your shot is what makes it, you actually have to think about the arc instead of just dropping things. Got my first Sun last night after probably twenty tries.
Really relaxing way to kill ten minutes between meetings. Runs are short so it never feels like a commitment. Only thing is I wish there was a pause, my runs end while I am reading something else.
Simple concept, hard to actually master. I kept stacking everything on one side for the first few games and losing instantly. Once you learn to keep the middle open it gets much more playable.
