Why did Rayman Adventures deleted or not found?

I was had one of the old ipads apple made. And i used to play Rayman Adventures all the time. Now i moved on into a ipad air. I went to search for my favorite game/ rayman adventures. But then i noticed that it literally wasent there anymore all i saw was rayman mini but thats on apple acrade why is it gone? Yeah i know this is stupid but literally why?

[Edited by Moderator]