Very frustrating game... 2/5 at certain levels you will see enemies end up falling ontop of you and when an enemy hits you and gets ontop of you it's instant death... Upgrades practically don't do anything only speed defence and ammo are increased slightly . I was quite dissapointed and i didn't even get to the 2nd boss.....
Total score 158,160 (game won by finding the cure) 2167 zombies killed :D
Btw for everyone to know when you start researching the cure , hordes of zombies will attack you almost every day so make sure you have everyone defending :) overall great game
Thanks for the feedbak, I made an options screen where you can adjust mouse sensitivity now.