my ufps demo game

game is just simple scene that i created.im looking for some zombie ai thats ufps compatable.if uou have ai please write in comments.game minmal sustem is 1gb ram 270mb hhd 128 mb grafics 2ghz 1core procesorrecomented is 3gb ram 300mb hdd 512 mb nvida grafics core 2 duo at 2.56ghz