The command looks fine. What error message are you getting? Do you have a game page set up?  You can't upload the file unless you have a target game page set up.  

For any game titles with spaces: Replacing them with - worked for me.

Trying to wrap parts of username/game:version in "" gave the invalid game error. Would be nice if the CLI returned "Invalid game: GAME_NAME" instead of just a mysterious error.