Out there somewhere, but nobody has found it — a planet merge puzzle themed around "Planet Nine" 🚀 Launch planets like billiard balls and merge matching ones, growing from tiny Mercury toward the ninth planet 🌟 3-5 minutes per run, played with a mouse. Scores go to global leaderboards 🪐

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About This Game

🪐 Merge planets and unravel the mystery of the universe!

It's out there somewhere, yet no one has ever found it——the "ninth planet". Collide cute planets together, merge them, and uncover the secret yourself.

🌟 Aim, shoot, merge

Launch a planet like a billiard ball and send it crashing into another of the same kind — they'll merge into one! Grow from tiny Mercury toward the larger planets, one merge at a time. 3-5 minutes per run, played with just a mouse. Perfect for a quick break, and easy to come back to again and again.

🚀 Features

  • A cast of original, adorable planet characters

  • A unique physics-based merge system — think billiards, but in space

  • Merging planets can send others flying your way — deflect them before they cross the line!

  • A cozy, relaxing space world to get lost in

  • Playable in 17 languages, including English and Japanese

🏆 Regional and global leaderboards

Your high scores go to both your country's leaderboard and the global one, ranked across daily, monthly, and all-time boards. How far can you climb? And what will you find when you finally reach the ninth planet...?

🎁 Collect as you play

Spend the coins you earn to unlock music, themes and illustrations. The more you collect, the more your own version of the universe changes.

🎵 Music from seventeen creators

The music features six guest composers (neruko / Sentaku / asMi / ꄲꅐ꒒ / Kadan / NemCa) alongside eleven more musicians selected through an open call.

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Streaming, Let's Plays, and video uploads are welcome. No permission needed, no reporting required.

Monetization through a platform's official features is fine, and the music and sound effects that play during gameplay may stay in the recording.

Full details are on the official site under "Video & Streaming Guidelines".

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AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

This game includes content created with generative AI during development. No content is generated live during gameplay.

Music: Some background music tracks were created using music generation AI (e.g. Suno AI).

Images: Some illustrations and background images were created using image generation AI.

This includes works created by the developer as well as works submitted by third parties through an open call and individual commissions. For submitted works, contributors confirmed the AI tools and external assets used, their ownership of necessary rights, that no third-party rights are infringed, and that commercial use is permitted.

System Requirements

Windows
macOS
    Minimum:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10 64-bit
    • Processor: Intel Core i5
    • Memory: 4 GB RAM
    • Graphics: DirectX 11 compatible
    • DirectX: Version 11
    • Storage: 400 MB available space
    Recommended:
    • Requires a 64-bit processor and operating system
    Minimum:
    • OS: macOS 12.0 (Monterey) or later
    • Processor: Apple M1 or Intel Core i5
    • Memory: 4 GB RAM
    • Storage: 400 MB available space
    Recommended:
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