Not a really exciting game.Very basic for a scratch game on NG.There is no reason to use the controls for movement and all the zombies die in 3 shots.There is no real danger, like zombies taking multiple hits or limited ammo.If this is your first game than it's quite surpising actually.I would reccommend slowly making it more complicated(zombies dropping ammo when needed, tougher zombies, maybe even levels).Not really much unique, the sound effects are classic stock sounds, and not even the good kind.Would just suggest improving graphics and having a unique concept, and of course making your own sound effects in a game.

Why did you reupload?

It isn't badly coded but it's too easy, I'd recommend adding a higher difficulty range