The HTML version does not start, and the zip folder is a Godot project that players can't start, that folder is only for you. To play the game, you need the exe and pck in the same folder, so you should put those two files in a folder, make a zip from that folder, and upload that zip, instead of the three current files.
Also, because the CRT filter darkens the picture so much, and the bullets have almost the same color as the background, I can't see the bullets at all. It looks much darker on my machine than one the screenshot, like this. I can't really give feedback without being able to play the game.