Jam entry options

Hi! can anyone help me with adding jam entry options? I may struggle with wording but I'll explain,



I want to make a jam that accepts all kinds of textures, skins, mob skins, texture packs, etc.

I tried to do it with my recent jam but couldn't quite figure it out ( i am old man when it comes to computah)

If anyone knows how this forsaken site works please let me know, ty!!!