I downloaded the game from the link provided
Which link is that?
Verify there is more than 12 GB free space on the device and directory where you download to.
Did the download complete successfully?
What exactly is the error message when trying to unzip the downloaded file?
I just tried downloading from the “Harem Hotel v0.18.2 PC/Android” -link. Downloaded OK and command unzip -t harem-hotel-win.zip shows
No errors detected in compressed data of harem-hotel-win.zip.