It's a decent Galaga knock off, but it's stupid overpriced. You need thousands of cards of ships to upgrade them (you'll get lots for ships or whatever you don't have and probably never will), prices are for whales (let's say you spend 100 bucks realistically you might get two first tier ships maxed out), guilds are a literal money pit (if you can even find an active one), and there is little to no content to play. Oh and I hope you like ads. Also extremely unfriendly to free2play.