Hey Champpeace, cool little survivor like game! Fun idea with the bazooka shooting everything, here are a few suggestions that I think would really help to deliver that idea more.
Ammo should be automatically picked up or contain a lot more ammunition per click, because the way it is balanced right now it's very demanding on the hand. I love the ideas like the barrel or the shoting stars or the enemy heads, but they really should feel like they make an even bigger difference if they're only occasional. Don't shy away from making them 5x more strong than normal ammunition and/or give them a special effect. it's rare and it should feel rare.
Good job!