I created this thread...I'll admit it, I only played for about 3 minutes, but it looks halfway-decent from what I saw.
And the graphics are pretty impressive for being under 30 megabytes (A HUGE factor for me).
No ads, but there are iaps. Haven't fooled around with the game long enough to find out how necessary they are.
BTW, the goal is not to kill zombies (boooo!), but to save them. Which, and this is new to me, apparently can be done by shooting a zombie in the head, knee, or wrist.
There are some nice touches: your gun has an info screen similar to Dead Space; you can look down the sights; the font was well chosen. No GC and some spelling errors, though.