If game runs slowly try to kill background apps and disable visual and/or sound effects in game settings. If game still runs slow, then I’m sorry =).-great action shooting game-controll your gunnery ship-10 missions-fight more than 25 types of enemies-use more than 10 unlockable weapons to destroy them-collect bonuses-compete world-highscore-play 4 different game modes-awesome graphics and sounds-lite version has ads and only 2 missions