I think it would be convenient for the ZAC fighters to have a user-controlled patrol area. they often wander off far from the base and end up sitting there because of new spawns. Also the gold generators upgrade cost/gold generation doesnt even seem worth it with how much gold you get from it in relation to the upgrade costs. More secret areas and bonus areas would be cool. Just some suggestions. GREAT GAME!! :) oh and maybe 1 or 2 more music tracks? :P cool music but gets repetitive especially when you farm levels
 "Enigmata: Stellar War"){kind=icon}
 "The King's League"){kind=icon}