Behöver hjälp med namn på gammalt spel

It's a 2D space shooter where the player controls a small spaceship. The controls are really simple, the ship can turn and move forward (so when you want to slow down you will need to turn the ship around and start the engine).
You start out on a big ship orbiting a colonized planet. Your goal is to destroy the other computer controlled players. A map with a few solar systems is generated every new game. You can take control other planets by landing on them. Then your already colonized planets will send out ships to colonize the new planet. If a planet is occupied by another player you will need to destroy the buildings on the planet before you can take control over it.
The graphics are real simple. The background is black and all other objects are made up by single colored lines, no objects are filled. For example, a planet is simply a circle, the buildings are rectangles of different shapes and a ship is a triangle. The color of the lines depends on the team. The teams where red, green, blue and yellow.
In the beginning of the game you only have a weak gun that fires single dots. But later they can be upgraded to crosses (more damage) and short lines (homing missiles).
When your ship comes close to a planet or a star your ship is affected by its gravity. This comes in to play when you raid enemy planets. The player tries to circle around the planet while at the same time trying to avoid being dragged in by the gravity and crash, to drift away to far so the projectiles wont reach the planet, and avoiding fire from the planet defenses.
I think it was run in windowed mode and that a mini map was shown in a separate window. I don't think it was released in a box but if I remember correctly it was not freeware because when you had control over 50% of the planets the demo ended.