Planet Merger vs Marble Drop

Drop a planet. Watch it fall, collide, and merge into something bigger. Planet Merger is a physics puzzle about building the solar system one collision at a time. When two identical planets touch, they merge into the next one up — Pluto becomes Mercury, Mercury becomes the Moon, and on it goes. The board fills faster than you expect, the physics never quite behaves, and one well-placed drop can set off a chain reaction that clears half the screen. MERGE ALL THE WAY TO THE SUN Eleven worlds to discover, from tiny Pluto to the Sun itself. Every collision is driven by real physics, so no two games ever stack up the same way. Cross the line at the top and it's over — so think about where each one lands. LEARN SOMETHING REAL Every planet you unlock opens a card of genuine astronomy: diameter, distance from the Sun, number of moons, day length, year length, surface temperature. Plus the details that stick with you — like the fact that it rains diamonds on Neptune. 220 PLANET PUZZLES A separate quiz mode with 220 questions about the solar system, space exploration, and the science behind it all. Ten questions a round. ONE TAP TO PLAY Tap where you want the planet to fall. That's the entire control scheme. Easy to start in a spare minute, hard to stop when you're one merge away from a world you've never seen. PLAY IN YOUR LANGUAGE Fully translated into 9 languages, quiz questions included. Free to play. An optional one-time purchase removes ads permanently.

Not in the mood for twitchy reflexes—just want to relax and use your head? 《Marble Drop: Yarn Sort 3D》 is a 3D color-sorting puzzle. There's no fancy control scheme and no reaction test—just pure logic, gently tidying up the scattered marbles filling your screen. How to Play Each level lights up a row of colorful "orders" along the bottom. Above them sit several "holders," and each holder contains marbles of just one color. Tap a holder and it drops a marble of that color; when the falling marble matches an order, that order fills up and vanishes. Clear every order at the bottom and the level is yours. Why It's So Addictive The rules take a second to grasp, but sailing through a level is another story. Marbles keep piling up and colors keep multiplying until the screen is nearly full. What wins here isn't speed—it's the calm of "thinking one step ahead." Tap the wrong holder in the wrong order and the whole chain breaks, sending you back to the start; you also have to keep those orders from stacking up. Every level is a tiny logic puzzle with a solution hiding in plain sight, waiting for you to find it. That "ah, so that's how it fits" moment when it clicks is genuinely satisfying. Perfect for Spare Moments · One move only—a tap. No fiddly controls. · Marble drops, color matches, order clears: the feedback is crisp and rewarding. · No countdown breathing down your neck, no pop-ups nudging you to spend. You set the pace. On your commute, in a queue, or in that quiet bit before sleep—open a round, give your brain a light workout, and you'll feel calmer for it. Bring order out of chaos and let every color find its place—the small, just-right joy 《Marble Drop: Yarn Sort 3D》 wants to give you.