I've played many a zombie game in my time and I have to say this one is... different! In a good way haha! Not too many side-scrolling games kicking around nowadays, and this one was a fun old time. The text is a bit off in places (totally forgivable when English isn't your first language!), but that just made the whole thing more fun in my opinion!
I'd like to see more of the puzzle elements in chapter two, that certainly stood out for me. Really looking forward to seeing what happens next! =) keep up the great work!