Is the universe in 2D?

The universe is a 2D plane with 3D graphics. In other words, there is a camera that you can tilt, pan, and zoom, and all the ships are rendered with fully 3D models, but the actions of the game world (movement, etc.) are all based on a 2D tile system.

Are the space battles in 3D or does it take place in a 2D plane?

There is a 3D cinematic-style combat viewer available to watch the battles in a Homeworld-esque way; however, this is purely a cosmetic feature. You can turn on/off this battle view for various types of battles as you wish.

How large is the universe in this game?

Tiny --> Gigantic. Everything from a handful of stars to a jelly-bean jar full of them. Everything from takes an afternoon to play, to takes weeks to play.

And does the downloaded version of this game come with a full manual?

In PDF format, yes.

- Ash

Thanks guys. This game looks impressive. Wife wont be happy, but I will give it a try.