Well, I know most of you were tired of getting AP randomly lost and all that. It's because it was saved by name and people were using your name and using your AP.

What I've added:

Registration system - now have to login to play, nobody can play with your name!
6 new skills!
Ammo - Per level, get 1 more bullet in all the guns clips you have
Recoil - Get less recoil on your bullets every level
Reload - Faster reload speeds
Wealth - Chance to steal 5 ammo packs from humans you infect
Evasion - Change to not take damage from bullets
Rage - Chance to get 2.5 seconds of no knockback (stil take damage)
3x the XP!

Let me know if you have any other suggestions :)