I found this to be a nice and unique game. My only problem was that when I went to Hank Mode against Tricky at the end, the screen wasn't working. I guess it was just a glitch in my system. I really liked how authentic it was. I only wish there could have been more. You could have added more levels with a health bar.
Of course, I guess a health bar is technically as usually as numbered health. The hardest part was easily the agents. At least the zombies didn't fire at you! I thought there might be a fourth wave with zombie agents. They've combined the two!