This game has a pretty good soundtrack, although only one is my favorite. It's featured in the game's trailer.
The game itself is simple and fun, but I wish that in some capacity that it were more difficult, or that like the Giantbomb.com crew, there were more default weapons besides the regular gun. The grenades are fun, but sometimes the delay in tossing more than one makes it feel like doing combos, as the trailer suggests, doesn't quite work out? It still works. It's just that this game can be so fast-paced that you'd expect to be able to toss out all four grenades in a pinch.
The visuals are cool. The SFX are pleasing. The game itself though.. It's good to pick up once in a while.
It needs more boss types, sadly.
I doubt I'll pick it up after they add achievements since I've never been one for hunting them too much, unlike in the game Bastion, where the narrator will often reward you for 100%-ing various portions of the game with a new piece of dialogue.