Too much grinding. The Symbian version still better than this one. Also the most ridiculous thing is, you only can play for X times per day and the weapon upgrades are too slow. They even make ship production slower after higher upgrades. Hey I know this is intended to make the users not quickly uninstall the game because of bored with it. But this is worse than same-as-usual gameplay like the Symbian version. At first, I almost spend my money to show my appreciation. But I disappointed now