Two numbers for movement work by playing them one after another, the
Add spending itself on the second — but clicking the ADD card itself,
the natural first instinct, showed nothing but a cancel button. It
now says how the ride works; a second number without an Add in hand
says what is missing instead of offering a doomed button; and the
button's label says "spends your Add" at the moment it does.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>