The concept behind this game is absolutely AMAZING. It is so original and unique and I love it to pieces. The art works well together to really capture the feel you were going for. I would suggest, though, perhaps a way for a player to fix their mistake if they increment the ammo down a little too much. Making the hint a little more specific would be another way to correct this, as it would give the player the information necessary to correct their mistake without it being just a button press to do it.. which is probably the better game design, now that I'm writing this out ^^;
I am amazed at how fun and unique this game is, and you put it together in such a short time! Very well done!!