According to Telltale, the controls and character movement in the iPad iTeration are similar to those found in the PC games. Selected inventory items will let you know where they can be used, and a two-finger prod will show all selectable items on screen. You'll want to put all of them in your pocket, basically.
(Note: We apologize if the above headline inflicted mortifying mental imagery on proud and paranoid iPad owners. Invest in a protective case, and never leave your expensive gadget unattended near a dock.)