To ensure no misunderstandings here, Voxelibre is running on Luanti as a 'game'. It's not a separate fork. It will be forked from the 'Minetest Game' which is the default (basic, unmodded) engine on Luanti.
The Luanti title screen gets substituted by the title screen of whatever game was selected/played before Luanti was closed. It makes Luanti itself like a 'console'.