Also for word scramble: the letters must be adjacent (horizontally, vertically, or diagonally).

For solitaire: just look up the rules online since these are common games. You move a card by tapping on the card you want to move, then tapping where you want to move it to. You move a stack of cards by tapping on the card at the base of the stack, then tapping where you want to move it to. (Yeap, no drag and drop. No gestures.)