What weapons are you going to include? Did you allow to show your enemies' hit points? And what's that green bar? (the grey one is your health, no?) Will you be able to upgrade your ship? Any temporary bonuses or total realism? How about repairs? Are you planning to have some location with the Earth itself? (Gravity? Death of falling?)
Weapons: Laser beams ,laser guns ,stun laser ,rockets...
You can see enemy health.
That green bar is Earth health but i will finish it later.
You can upograde ship shield, speed, health...
You can repear and buy ships.
You can buy base.
Ships: small fighter, fighter ,battle ship,ion canon... (maybe carier).
Your base and Earth can produce frendly ships.