Ok.. this is my first time here and I actually took about 5 hours to get to this final point. I was only able to start working on it at about 5 PM EST, so I rushed to do the best I could.

Some facts I would like to highlight:
This is the first time I work alone with HTML5, so I'm sure there are lots of stuff I did that I could have done better.
I did not want to use any framework, so I used some pieces of code I had done before, utilities like an asset manager and some functions to handle the canvas and do some math.
Expect bugs. And some poorly coded stuff. And I also could not work on the audio.
In summary, this is the best I could deliver in the time I had, but I really hope to do something better in the next time.

Now, about the game:
WASD move your block and you shoot with the cursor. Just avoid the red zombie blocks the longer you can.

Well, at the end of the day it was an enjoyable experience.