I have found my self in some free time lately, and am now working on MissileStorm 2. 

Main changes
New campaign missions.
More Bots,  that are a little smarter.
More complex collision detection, so you have to shoot the shield generators on a boss or something before you can damage it.
More guns. Previous game had set missiles and mini guns. In MissileStorm 2 I am hoping to have a config screen where you can choose different weapons. Some for swarms and some for heavy targets.
 

Might also reach out to an artist about making a cool splash screen for the game.

No deadlines for me, since this is just a hobby, but I am working on it anyway.