Space Trader

Buy low and sell high across six worlds in thirty days, dodging pirates and chasing price spikes to pay off your loan.

Simulation Emulator verified v1.0.0 18.7 KB

Download JAR Download JAD Release page Source code

The JAR and JAD are the Original Java ME Version for phones and emulators. How to install.

About

A compact space trading sim. Every planet produces some goods cheaply and pays a premium for others, prices drift each day, and news of shortages and gluts can double or halve a market. Fill your hold, plot a course on the star map, and watch your fuel: longer hops cost more days and more fuel, and fuel is cheaper on the outer moons. Pirates may raid your cargo on arrival. Expand your hold when you can afford it, and finish day thirty with as much money as possible after repaying the loan.

Objective: End day 30 with the highest net worth after repaying your loan.

trading economy space simulation

Space Trader title screen — Title screen

Space Trader running in MicroEmulator — In MicroEmulator 2.0.4

Screenshots captured from the real JAR at 176x208 on the project's reference runtime; the third image is rendered by MicroEmulator 2.0.4.

Controls

Key	Action
`2/8`	Choose good
`6`	Buy one
`4`	Sell one
`3`	Buy max
`1`	Sell all
`5`	Star map / travel
`0`	Buy fuel (map: back)
`9`	Upgrade hold
`*`	Pause menu

In every game: 5 selects in menus, * pauses, and on the title screen # opens help and 0 toggles sound. The joystick and 2/4/6/8 are interchangeable.

Verification

Level	Status	Details
Build verified	Yes	Compiled against CLDC 1.0 / MIDP 2.0; JAR + JAD generated
Reference runtime	Yes	Passed at 128x128, 128x160, 176x208, 176x220, 240x320
Emulator verified	Yes	Automated smoke test on MicroEmulator 2.0.4 (176x220)
Real device verified	No	Not yet tested on real hardware

Tried it on a real phone? Send a device report.

Technical details

MIDlet	`spacetrader.SpaceTraderMIDlet`
Platform	Java ME, CLDC 1.0, MIDP 2.0
JAR size	18.7 KB
Screens	128x128, 128x160, 176x208, 176x220, 240x320
Storage	RMS record store `gk` (settings, best score)