Planet Merge

Planet Merge is a browser puzzle game where you drop planets into a round container and combine matching ones until they grow into the Sun. It runs on HTML5, needs no download, and you can play it for free on desktop or phone. The whole loop is about placement and patience.

How a Merge Run Builds Up

A round bubble holds every planet you throw in, and its floor slowly fills as you play. Matching two of the same body fuses them into a bigger one, and that bigger planet then sits there waiting for its twin. Gravity does the rest, so a drop near the top can knock a whole column loose and set off a chain of merges you never planned. There are ten celestial bodies in total, starting from a tiny Sputnik and ending at the Sun. The bubble is your timer and your enemy at once. Let one planet drift past the edge and the run is finished, with no second chance.

Small Planets, Big Personality

The planets have faces, and that matters more than it sounds. They smile when they bump into each other, and those little expressions make a bad drop feel less like a loss. I tend to start by keeping the two smallest types stacked on one side, because thinning them out early keeps the middle open for bigger merges later. It is a slow game in the best way. Nothing here rewards rushing. Good aim and a calm hand carry you further than frantic clicking, and the score climbs quietly while the bubble gets tighter.

Controls

Everything runs on one hand and one button, so there is little to memorize.

Hold the left mouse button on the next planet and slide it left or right to pick your spot.
Let go of the mouse button to drop the planet into the bubble.
On a phone or tablet, drag with a finger and lift it to release the planet.

The Long Climb to the Sun

Every planet you unlock makes the next step harder to reach. The early bodies pair up fast, then the same ones stop showing up, and the bubble gets crowded with the middle sizes you cannot clear. Two of the biggest before the Sun take up more space than anything else on the board, so a single misplaced drop can end a long run. I have lost more games to one lazy release than to bad luck. The rating sits at a perfect ten right now.

Playing It Anywhere

The build is HTML5 and runs in the browser on desktop, tablet and mobile, so there is nothing to install and no file to keep updated. On a wide screen there is more room to line up a shot, which helps when the bubble is nearly full. On a phone the same drop works with a thumb, and the planets still read clearly at the smaller size. Developer AZGames keeps the art bright and the rules short.