GUYS! I AIN'T LYING! I found a way for UNITY GAMES TO WORK!!!
You can believe me or not if you want, but now I LITERALLY JUST MANAGED TO PLAY THIS AFTER YEARS AND YEARS!!!!!
Here's how I did tho :
First I used Internet Explorer, but I think it works with safari tho!
I searched on YT "unity failed to update" and got this video :
https://www.youtube.com/watch?v=vHYE6ZWz7ys
So it is basically some software that you launch and it just randomly fixes unity once its done. I SWEAR it works, but anyways you can try on by yourself.
So yea, now I'll go play some unity games I used to love when I was a kid! SEE YA!!!!!!!!!! :D
 "Jelly Lift"){kind=icon}
 "Idle Snake"){kind=icon}
This may be late, but the game has been fixed! It's no longer just a blank screen.