Zombie Shooter 3D Need help !

Hey my name is and I starded a Zombie Twin Stick Shooter game a month ago. Now I made the most of it but I still need help for couples of things !
In this game, you kill zombies, earn cash avery bullets you put into a zombie, and die I you get touch too much by Walkers.

I’m the one and only working on this project since day one and I need a Helper !!

This is a little work in progress : VIDEO HERE !!

http://s24.postimg.org/5y67wzrlw/Capture_d_cran_2016_03_05_17_15_15.jpg