I like the idea, and with the simple controls it's easy to play as well, but it feels like the turret just fires too slowly, and as a result, the game progresses slowly. I'd rather have a faster turret and faster foes to increase the challenge along with the pace, but apart from that, it's a fun game! The interface design is especially fluent too, and I like the way the crosshair envelops th entire screen. Keep it going!
-cd-