Some games not available on rear screen

[CTCotopaxi]

Ok stupid ?, I’ve searched all over and can’t seem to find the answer . Why are some games not showing on rear screen ? Example … Boomerang Fu , solitaire? ??‍
Asking for my kid ??

 

[Tecyber1]

lol...I have been meaning to check why this is? Boomerang-Fu in particular. Why would this NOT be available on the back screen? ha!