Cancel Time is a feature in your Settings menu and lets you slow down the time it takes for a purchase action to complete. Move the “Cancel Time” slider to the very right of the bar if you want to catch the cancel before the action completes.
If you do not want to wait for any actions to be completed and want an immediate action when you tap, move the “Cancel Time” slider to the very left. If you accidentally tap an action that did not mean do, for example hurrying a caterpillar, the Cancel Timer will slowly move around until the circle is complete.