A new Series i just now ran into. I wanna spill my thoughts. My opinions. :P
The things i really loved about it was the voices, the animation's FPS, and it's story (although slightly cliche) The things i found rather unappealing was the quality. For one, things like the spear's tip, character eyes and other object we're bland. I could tell you used some tool such as Shape Tool for circles, triangle and diamonds. Try to actually give these things more depth by drawing them with effort and detail. That should give it more of an attractive look. Other than that, this was great. :D

Can't wait for the second part.

I loved this! :D

Grey Story indeed.

I've always loved a good game or movie that has a interesting and touching story behind it. To this i give it thumps-up, high-five, and a A-ok!! ^^

I'm really sorry

Im' sorry to say this, but it's just really bad. Now, you can probably try to improve your game a bit. Add more motion to your Character and zombies, but more your CHARACTER. Next, make it more challenging, but not impossibly stupid like Lv 4. Add more of a train of though. If you can't draw well, then get some help from someone to be your Illustrator.

I really can't give great advice, since i am a beginner myself to animation. But even i know you can add more than this.

Also, if you're gonna keep making games, Don't put "You loose you noob" Cause some people take it serious and that seriously fuck you up, even with the horrid game. >.<