I think it's fine because it lets you kill a little time with a fun shooter. I personally went ahead and went to the actual site to play a little further into it. After I was cut off there and prompted to buy the game, or whatever, I felt a little ripped off for a minute though. It's kind of like they pimped out a commercial to armorgames. In the end though, it's fun while it lasts, however brief.
Yeah, I went over and played the full free version. It's a ripoff that you have to pay ten bucks just to play the entire game. Still pretty good though.