The lag on this game makes it unplayable for those with moderate to lower end computers, which takes into account a huge amount of casual gamers. The fastest graphic settings aren't "fast" at all.
Cool game! Found a glitch. On the last level as you're taking a mothership, if you take your units and click off to a new mothership removing all units right as you kill it, the mothership stays and now shoots lasers at both you and the other mothership's units!