Good game. In my opinion, nothing too new, but it's fun to play. The controls and guns are good, but the 1st gun gets a little bit useless at the later levels. I think the guns could have bigger reloading times in the unlocking order. Maybe the 4th could have slow firerate? I also think that a score based on time and accuracy would be a really good implementation (with possibility to share the score, maybe), as well as other scenarios. And when I finished the game, it sent me back to the 1st level, but the street is empty.