Little Game Room.
Puzzles & Logic

Orbit Builder

Build a solar system. Twelve orbit puzzles, no collisions.

About Orbit Builder

Play Orbit Builder, a free space puzzle for World Space Week or any day. Arrange planets, adjust their paths and solve twelve collision-free orbit challenges.

How to play Orbit Builder

Arrange each numbered planet using its orbit, starting position and speed. Test the system for twelve simulated seconds without a collision. Planets need space even when they share an orbit. Gray moons have locked paths; avoid them too. Complete twelve levels with fewer available orbits and more planets. This is a timing puzzle with scripted circular paths, not a gravity simulation.

A space puzzle for World Space Week 2026

World Space Week takes place October 4–10, and the 2026 theme is Rocket Revolution. Orbit Builder offers a hands-on timing puzzle for a space-themed break: position your planets, change their speeds, and see whether they can share a system without colliding. The circular paths are deliberately simplified; this is a puzzle about timing and spacing, not a model of gravity.

World Space Week official website

Tips for your next attempt

Start by spreading planets across different orbits. When a level limits you to one orbit, equal speeds preserve the gaps between planets. Change one setting at a time so you can see why a test succeeds or fails.

This is an original Little Game Room game, independently made and not endorsed by the event or organization mentioned above.

Players and saved progress

Play on your own, without an account. Progress is saved in this browser on this device. It does not sync to other devices.

Use the Comfort button for larger card faces, contrast, sounds, timer visibility, and reduced interface motion. Arcade movement remains active.

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Make yourself comfortable.

A few small adjustments, just for you.

Remembered across all games on this device.

A familiar game, a quick refresher.

  1. Build the four foundations. Place aces in the top-right spaces, then build up to kings in the same suit.
  2. Alternate colors on the table. Place a red 6 on a black 7, for example. You can move an entire face-up sequence.
  3. Make room for kings. Only a king, or a sequence starting with one, can move to an empty column.
  4. Turn over a new card. Click the face-down deck. When it runs out, click again to recycle. You can go through it as often as you like.

Keyboard: Tab to a card and press Enter to select it. Tab to the destination and press Enter again. Escape clears your selection. You can also drag cards.

Deals are random; some cannot be won. Hints suggest legal moves, not a guaranteed solution.

A fresh start?

This will replace your current game and undo history.

Beautifully played.

Enjoy that little moment. You earned it.