An interesting twist on defense games.
Haven't played a defense game quite like this before, since you could actually push the enemies away from you rather than just blow them up instantly, but instead you could blow them up when they group up in order to get combos and a higher score, etc. So therefore, I quite liked the interesting twist this game had. The only reason I couldn't find myself playing this game for too long was because after a while it got pretty repetetive, the bombs regenerated somewhat too easily, and it was too hard to group the enemies together to get a good combo.
But apart from those small flaws, I liked the way this defense game was different from the others, so I'll give you a 7/10 for it.