Love it. Just LOVE it.
Really, what more is there to say? It's a wonderful game, so was the first, it should be played by ALL! The pause button is quite a nice addition though, and so are the many new weapons... I love it, but the are a very few things that could improve it; They are as follows:
1) a mute button, 'cause the boss gets mad at me when I play this all the time and he can hear it down the hall, and while I COULD simply turn off my speakers, I then can't listen to my music...
2) a quality selection button 'cause after a while, it REALLY starts to LAGGGGG... around level 30 or so, I find...
Other that those 2 things, nothing could make this game better, in my opinion. please, make another one. 12/10 in my personal score book. Good job, nay, better than that, uh, no, there is no word in english that describes just how good a game this is. Props to you. again, PLEASE make another. Totally worth my time to play... and your's to, whomever reads this!