Add sounds and more colors. And if possible, make an actual ammo bar instead of a loading bar. Also it's "lose" not "loose".

One more thing, the uzi is TOO expensive.

Hmmm so where do I start?
1. opening the shop resets all enemies
2. theirs no way to reload besides opening the shop
3. the screen is SOOO small, I almost couldn't read anything
this is the definition of blam

You said "You loose!" instead of "lose."

Still, it needs more work because if I were a COD fan, I would have cried. The background is plain WHITE everywhere and the buttons have no style. It doesn't feel... adventurous. Also, why are the enemies green balls? This must be improved. I am rating this half a star

this take you 2 seconds to make?