Ok ideas and bugs:on the spawn there are bugged textures mouse sensitivity is high if you jump you cant move if you walk you hear the audio on left or the right so move the audio into the gun so you hear always same also if the zombies are too close you cant shoot and it will be good if you will make more zombie types and gun types also if the upgrades wwere on UI sorry for so messy text also the difficulty curve is really high but thats not important but more upgrades ammo realoding etc...