Digit Span Challenge

Depending on the selected mode, the target order, i.e. the order in which the digits must be entered, changes:

• Forward (default) requires the digits to be entered in the order in which they were shown.
• Reversed is the opposite of forward, e.g. "1532" should be entered as "2351".
• Ordered is the numbers in ascending order, e.g. "1532" becomes "1235".