I would recommend changing the sound, the little sound there is right now is really annoying and repetitive
Sometimes the bullets don't fly straight
The game needs more challenge
More zombie variations.
506 nightmare is VERY correct... and you need more answers for ALOT of the questions, such as the "what about zombies creeps you" or whatever that question.
61%
Good tutorial but I really wish it was more descriptive, and more in depth, as the way you wrote it, it is very difficult to properly understand exactly what it is I should be doing.
Dusk, don't encourage others to downrate just because your having problems, instead of getting mad at the game try being proactive and finding a solution. The game works perfectly fine in Internet Explorer
Interesting game, though for everyone it should be noted that after you shoot an ace on a level, if you fail, the ace still counts, I could NOT figure that out and I had to be told before I could finally beat the car mission