i have no idea how you managed to pull this off on flash. amazing job. still, there are a few things that i would like improved. 1: put some color into the game. make the guns and cars a bit more colorful instead of plain gray.
2: If you can, remake the character/enemy models. that would probably be really hard to do, but i'd appreciate it. you should really replace the bullet picture, though. it looks like a Sonic Tatertot. Great job :)