Okay, now I see it. If I knew beforehand that I could access the shop with the escape button, I would have posted a much better opinion of the game. I was a little brash rushing to my conclusion. I thought content was missing but it was really there.
First off, the game mechanics are very lackluster. It's not exciting to hold the left mouse button and repeat typing wasd to run around groups of zombies with a very underpowered weapon. Second off, this game is clearly incomplete. There's no sound, and there's nothing to buy with in-game currency. I know you intend to make a five-star game, but the game itself at this current state isn't worth 5 stars. I'm sorry but game development is a tough business.
In The pause menu, you have access to the shop and upgrades, all bought with in-game currencies.You can choose a gun to buy or upgrade, so your weak weapons become stronger, even the pistol.Also, in the pause menu you can access the "mute" button.The sound is set auto to mute, because many players did not like it.If you want to enable the sound, just press the button in the pause menu.To access it, press "esc".I am sorry the lack of explanation in-game.Thanks for playing!
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Sorry, my bad.I forgot to mention the pause button in the instructions.But hey, I am glad you liked the game!I really hope you like the next updates.