its fun for a while BUT it needs A LOT of improvment,first, try to change a bit the music,add it more variarity,it gets annoying,second maybe some gin variarity too!,and changing the concept a bit,also add more animaitons,i understand the practice dummies,but the zombies should move more, and finally how about if you make the zombies stages if you dont kill them,they'll aproach instead of time limit, thats all i have to say