Hey Slime! Just checked out NDDoaZ.
I couldn't get the game working reliably in the browser (it would open but I had no controls). But I downloaded the Windows version.
I liked the sprites and general aesthetic of the game. But I was having difficulty with hitting the zombies without them hitting me as well. As others have said, a title screen / game over screen would be preferable to just popping into the action (and the game closing at game over) but it is great that you finished something out for the game jam and got it out into the world!