Hello Klaus,
Thanks for the interest in Supremacy, I'll see what I can do about those questions.
-Do the units have movement points?
All mobile units have a maximum movement range, but are only allowed one opportunity per player turn to choose their destination.
-is movement 3D or 2D?
-Do units move on squares or hexes?
Movement is two-dimensional on a square grid.
-Is movement radius unlimited or depends it on proximity to a supply base?
-Do terrain influence movement?
Movement radius is not enhanced/penalized by the presence of other units (there is no "supply base"). However, in space combat, units require resources to move -- so you must manage your supplies carefully to avoid being unable to move. In ground combat, units are free to move, but terrain does effect the disance they can move. Elevation, as well as terrain type (ice, grass, etc.) influence the movement choices of each unit.
-Can units stack?
No, units cannot stack. Because of this, you can create defense lines that cannot be skipped over.
-is there a zone-of-control? (for example on adjacend terrain tiles)
Each unit has an attack/interaction range. The ranges are very different for each unit; for example, the flameflower has a cone range, while the sniper has a thin circle which prohibits him from attack adjacent units. Another example would be transporter range in space, you must be adjacent to the unit you wish to transport to/from.
-how is it handled? Can you explain the combat mechanics (if possible detailed)
Unit vs unit combat follows this basic model:
1) Unit A moves so that Unit B is in his attack range
2) Unit A initiates an attack, and deals damage to Unit B
3) Unit B, if not destroyed, automatically attacks Unit A if Unit A is within Unit B's attack range
That said, combat is much more complex, given the number of variables that effect your units. Your choice of CO may give your unit a bonus, your unit may be a veteran (having survived several battles with other units), you may have combat upgrades that your opponent does not, your unit may have very low health (which scales down your attack power), and the list goes on. To be skilled at combat in Supremacy, you must learn to use all of these features (and those I haven't described) to your benefit.
-do terrain influence combat?
It does not effect combat other than by requiring careful planning as to how units will reach the front lines (and other combat goals).
-is there an orbit-space interaction (like bombardements or orbital drops through enemy fire as in the film starship-troopers)
Yes, you can purchase the Orbital Strike upgrade from the Science Stations in space. This allows your freighters (which are what you transport troops with) to blast the ground map with a wide-area assault beam. The larger the freighter you purchase, the more powerful the beam will be.
-can you explain the economical mechanics?
I'll give you the basics. Planets you own (which have at least 1 factory on them) produce resources. They produce more resources for each additional factory you purchase. If you have more than 4 factories (without the Safety Protocols upgrade), you run the risk of planetary destruction -- a very bad thing.
Each planet class produces a different amount of each resource other than gold, which they all produce. The resources are: gold, food, crystals, fuel, and ore. For example, an icy planet (Fvost planet) produces an excess of crystals, but is somewhat deficient in food production. So you would want to conquer a lush green planet (Altan planet) to balance out production -- supposing you were looking for food and crystals.
Almost everything that requires "money" in the game requires a combination of all 5 resources.
-is a kind of trade system included?
No, you do not trade with your opponent, you conquer him.
-is there a demo? (I hope

)
As stated in other threads, we do not currently plan to release a demo. But keep your eyes open, there are just a couple short weeks before Supremacy is released!
Vance Vagell
Programmer
Black Hammer Game