Per README.txt, the Windows file explorer cannot extract passworded files by default. You will have to install an alternate utility such as 7-Zip. https://7-zip.org/
I will update the installation instructions on the game page to clarify this.
ah, i made a similar game but didn't know i could make a password-ed zip file, so mine contains a password-ed 7zip file. Didn't think to use 7zip to open normal zip files or know you could even put a password on a normal zip file. I should have read the games page a bit more.
