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Orbital Order is a free browser Aufbau electron puzzle. Move the cursor to attract blue s-electrons and repel orange p-electrons, then seat them in empty orbitals. Fill six elements from hydrogen to oxygen. About ~32 KB after Play, no install, no account.

Want a radius-aim shooter instead? Try Orbital Radius Shooter. Prefer a space gravity mini-golf loop? Try Gravity Orbit Golf.

ORBITAL ORDER

Cursor physics: blue electrons follow you, orange electrons flee. Seat them in orbitals without double-hitting filled shells. Keys: M mute, I help, L log, Esc close. Saves use ftol:orbitalorder:*. Adapted from aftongauntlett/js13k-demo (MIT). About ~32 KB.

Works best with a mouse or trackpad. On small phones a desktop hint may appear.

Press Play to load the game.
Best time and tutorial flags stay on-device.

Welcome to Orbital Order - a free browser Aufbau electron puzzle with no account or install. Move the cursor to attract blue s-electrons and repel orange p-electrons, then guide each particle into an empty orbital without double-hitting a filled shell. Climb six elements from hydrogen through oxygen while procedural audio plays after the first click. About ~32 KB loads after you press Play. Best time and tutorial progress stay on-device under ftol:orbitalorder keys. Nothing is uploaded. For more free browser games, open the games hub. Related picks: Orbital Radius Shooter and Gravity Orbit Golf.

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Frequently Asked Questions

What is Orbital Order?

A free browser Aufbau electron puzzle. Guide electrons into atomic orbitals with cursor attract and repel physics.

How do I play?

Press Play, then move the cursor. Blue electrons follow you; orange electrons flee. Seat each electron in an empty orbital.

What happens if I hit a filled orbital?

Hitting an occupied orbital twice ejects the electron. Keep shells clean while you fill the Aufbau sequence.

What keys work?

M toggles mute. I or ? toggles help. L toggles the log. Esc closes the open panel.

Does it save progress?

Yes. Tutorial and fastest-time flags use ftol:orbitalorder:tutorialDone and ftol:orbitalorder:fastestTime in this browser.

How big is the download?

About ~32 KB of HTML, CSS, and JS after you press Play.

Is this open source?

Yes. Adapted from aftongauntlett/js13k-demo (MIT). Procedural Web Audio; no CDN assets.