Why doesn't vim adventures let me type numbers for my commands despite their examples show them?

I was trying to practice using gg since it’s not clear to me what it does with numbers as pre-fixes.

I saw their examples and then tried typing one myself but I get a complaint from the game.

I am trying to type 5gg but I get I’m not allowed to type 5. I am I not far into the game to use numbers or why is the game even showing examples we can’t use?

Example:

Error message: