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: the heading tape, energy readouts, contacts stack tracking an interceptor, and the orbit band sweeping through the canopy

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.
The ship inside its shield bubble with wreckage pieces streaming in around it
Wreckage pays twiceDebris streams to the nearest ship on its own and yields both a crafting element and salvage credits. Credits patch the hull; elements feed the forge.
The VESSEL panel open in-flight: skill points, craft recipes, and repair controls
Craft gear, spend pointsEvery level banks skill points; crafting a tier costs its material recipe plus one point. Shields want titanium and ice, drives iron and carbon — the panel shows what you can afford.
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

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