Little house of horrors is a game where you explore an "abandoned" mansion to find clues to close the portals before Cthulhu devours our Small World.
Extract to anywhere, then run the executable.
Under some operating systems, you may need up "unblock" the zip.
Right click the file, Chose Properties. On the General tab, there may be an Unblock button in the bottom section below the Advanced button. If there is you will need to click that otherwise the zip won't extract properly.