Simulations

Orbit Jumper

Hitch rides on gravity. Fight off the raiders. Keep your orbit if you can.

Space is not a shooting gallery — it is a set of rails, and the rails are gravity. Propulsion is deliberately weak against interplanetary distances: getting anywhere means hitching rides on planets, while alien raiders hunt you in packs that keep getting tougher, forever.

▶ Play in your browserGet it on itch.io

Free · no account needed · desktop, iOS, Android — native builds for Windows, macOS, and Linux on itch.io.

Cockpit view: raiders crossing the canopy with projected trajectory dots, heading tape, and the contacts stack

Screenshots

The game

Orbit rings around a planetoid
Ride the ringsEvery body advertises orbit rings — one click and the ship plans the burn, captures, and rides. Riding recharges the tank; energy prices every free-flight maneuver.
A pulsing lock ring around a clicked target in tactical view
Click to lock, then fireDesignate any hostile and your laser and missiles prioritize it. Missiles chase their mark and detonate as an area blast; laser tiers pierce through hulls lined up behind.
A dreadnought boss dwarfing the player ship at point-blank range
Fight what your level summonsA bullet-hell curve that never stops tightening: twelve-ship swarms, mine-laying weavers, carriers hatching interceptors, and dreadnoughts as regular spawns past level twelve.
The living sun: shader-driven plasma with storm cells and a breathing corona
The living sunEvery star is a WGSL shader, not a sprite — fractal plasma, wandering storm cells, a breathing corona, palettes riding each sun’s spectral class. And it casts real light.
A comet nucleus streaming its anti-sunward mote tail
Comets drag ice down the darkSun-grazers outgas near perihelion, drop collectible ice along their path, and hurt if you fly through one — the shield absorbs first, the rest burns to the hull.
System-scale view: full orbit tracks around the sun
A whole galaxy on railsDeterministic f64 simulation at a fixed 60 Hz. Zoom from cockpit to system scale, survey suns for bounties and cheaper jumps, and hop between seeded systems indefinitely.
Orbit Jumper running in a phone browser in portrait orientation

Plays on your phone’s browser

The same build runs on iOS and Android with touch controls — no app store, no install. Add it to your home screen and it launches like a native app.

Key highlights

Why players stay

Plays instantly, no install

One click in any browser — desktop, iOS, Android. The web build is a full PWA you can pin to a phone’s home screen.

Self-updating native builds

Signed macOS builds check for new releases and upgrade in place. Windows, Linux, and Android builds ship from every release.

True-reset progression

Levels, skill points, crafting recipes, salvage credits — and death is a true reset. Only your material stash and career records survive the hull.

A real simulation underneath

Deterministic f64 physics at a fixed 60 Hz, celestials on Kepler rails, gravity that actually slings you. The feel of play is the physics.

▶ Play Orbit Jumper now

More simulations: Town of FriginRain · all simulations

Support · Privacy — we collect nothing