Invalid Commands

If you enter a command that Ruby Racko does not recognize, the game will append an "Invalid input: ___." message to the previous prompt and redisplay the prompt.

For example, if we enter the erroneous command "this is my command!" as shown in the Entering a Command example, we will see:

Ruby Racko only accepts keyboard commands that are currently displayed in the Control Panel. Commands that are valid at point "A" during the game may be invalid at points "B" and "C".

For example, even though the number 2 is a valid command when selecting the number of players for a game, entering 2 is an invalid command when you are trying to save and end your turn.

We should have known that 2 is an invalid command at this point of the game because2 does not appear next to any of the response options.