Same batshit 360 combat of the earlier games, and soon to include:

9 playable transforming fighters in 16 color schemes,
Dozens of customizable weapons and equipment,
Mission select system
More enemies and allies; 18 fighter sized and 12 destroyer sized ships
Improved HUD, radar and auto-tracking systems
...and whatever else I come up with

I may sell the final game as shareware, depending on what sorts of systems I can find.