Flight Commander 2 is in the works. It's still very early, but here is the first demo.
Get the windows version here.
It also runs in your web browser. At the moment, just firefox.
You can walk around on foot on your carrier. Fire guns, missiles, and fly a simple mission and see briefings and a landing cutscene.
(press enter to perform an action while on foot)
Enemies don't fire back or move.
Can fall through the floor on the way to the lounge in some cases