Kill the smiley

ok I found a video of of the game being played but I haven't found anything to Play the game

Link for the game play
youtu.be/_cLGIF6XITI?si=9yzdcDpqGWC24y7u

So even though i can't really say anything about R, or not your dad's wrong,or right because your post introduced me to the game so i had no idea that it existed before hand but i did found a website

About the Smile･The Splattering game it said that the game was made in 1995/6 and that you and your family played it on windows 🪟 95 so because of the website i dear by can say that you most
Likely found the game already

I've personally done hours of searching for this over the last several days, and so far, I can find nothing on a Windows version of this game. I've only found info about the Mac version, Smile: The Splattering, and there's not too much about that version, either.  Pretty much what's online that I've been able to find is already in this thread, except for one page that may have possibly hosted the game at some point:

Cool Stuff

Under the heading Little Games on the page, there is a game listed with the title Kill The Smiley.  Unfortunately, none of the games on the page, including Kill The Smiley, were archived, so there's no way to know if it was what you were looking for, or if it was simply a different game with the same name.  In any case, it's possible evidence that the game wasn't just a misremembering or distorted memory, and was at least available and distributed online at some point.