maybe add a pack shop so like you can buy random packs that are themed so like a lazer novice pack that has a chance of 2 any lazer style weapons or units unupgraded that costs say 1000 silver and then maybe a elite lazer pack that can get 2 upgraded lazer weapons or units that costs say 10 platnium and stuff like that
you should add a larger reactor or some sort of upgrade for the reactor and you should add upgrades for buildings like reactor that adds a built in reactor to that building. you could also add some sort of tier system for the upgrades so you can choose the upgrades for more money or you can gamble with different rarity upgrade slots. you could also add some sort of featured ship of the week that is a random ship that is cheaper than normal with 3 upgrades on it.
you should add the option to any carriers that you can attach any fighter you own to it so it send that fighter out instead of the default pirahnna launcher
if you press 3 it makes you lose health if you press 4 it makes you gain health if you press 5 it makes you lose cleaness if you press 6 you gain cleaness if you press 1 you lose love if you press 2 you gain love.