I do want to point out (BTW I am the Developer of the game) I use a program called "Construct 2" its a Game Engine for 2D Browser-Based games
Without buying a License it limits how far you are allowed to Develop a game, so as much as I wanted to add Shop Features, new zombies, Audio, and even a Ending Cutscene I couldn't because I don't have the money to buy a License.
So please do not give it a bad rating because of its Current State, I would promise a brand new patch Re-Designing the game if I had the money. Please do note the message you get when you first hit Play. Feel free to donate if you really want to see it continued, but until then my means of Development are dry when it comes to this Game.