not bad
pretty good but too repeatedly...but as you said it will be for your site so its does not have to be big.
the spanish name is a trun off, for i am canadian and the second language here is French.
the graphics were great and it was really fun to recognize some of the zombie faces.
To make you game better try adding levels. Like if you kill 100 zombies you advance and maybe repair house or unlock stuff like movie info. but you can keep it as is and see if it passes..
ill give you a 5 to help the game pass ;) hope it does.