All in all this is an excellent TD. There are always multiple builds that can tackle each problem, thus giving the game a lot of replayability. The artistic style is fun and the balloon-popping sounds are satisfying. Edit: Changed to 3*. A MAJOR negative is that there is no snap-to-grid mechanism while needing pixel-perfect targeting requirements. It's hard for mobile users where placing towers requires a very steady hand. Ultimately, this is a very good game that just wasn't designed for mobile