Although I'm fine if you refer to a page as a specific name and not as the digit (I even did this once,) please do not name a page "Level ___ - the ____ ___ ___." The digit alone is enough, and you can put the title in a Displaytitle template.
Levels with numerical values should only have that value in their name; Levels without numerical values should instead have the name of the Level in it. For example, Level Fun has no digit, and thus does not need to be moved. Meanwhile, the hypothetical "Level 9996, Escape" should instead be "Level 9996," with the title, "Escape," being desplayed in a {{Displaytitle}} template.
IG you have a point, but I don't know. I rather have the title of the level revealed to let people know what they are dealing with, or have a rough idea of what the level is about.