Klondike Solitaire rules apply. Mouse only controls unfortunately.
Click + drag to move cards. Click on the Reserve pile to deal cards.
Double-click to send a card to the foundation. Double-click and hold to start automatically moving cards to the foundation (if possible). As long as you hold the button down, cards will continue to move to the foundation as you move the mouse over them.
Undo move by clicking the Undo button or by pressing ctrl+z.