Okay, wicked addictive game... good job!
Complements! I mean in all the stuff there is to play right now... to come up with a retro game that takes us back to the earlier age... well done and keep up the great work!
So here is my thoughts on extra content... but to be honest it is great the way that it is!
1) EMP (either blows up or stalls dead craft within range... or both! The stalled vehicles can crash others).
2) Shell. A "hard" force field is temporarily formed around vessel. It can (and should) be used to ram opponents.
3) What's yours becomes mine. Enemy splashed by ray fights for me!
4) Double down. Fire power is doubled in strength.
5) Fence. Level is split by direction of weapon for period of time. Isolating opponents.
6) Meet my little friend. A PEW joins the fight with vengeance.
... and many more!
Game on my friends and keep it coming!