Two player game
The two player game is very different from a one player game.

Starting a two player game
To start a two player game, select Game New Game on the menubar. This will bring up a dialog. Simply select Two players under the drop down box labeled How many players do you want?. Then click OK.

Playing a two player game
There are four phases to a two-player game:
you begin to draw cards
then you bet some money
after that you exchange your cards
then you raise and finally you will see the cards of the other player and the winner will get all the money.
Draw 	You will begin the game with $100. After clicking on the draw button you will get five cards. That's all, here.
Bet 	Now you decide if your cards are good or not. If they are, you bet some money - at least $5 and maximal $20. Just click on the +$5 and similar buttons.
Exchange 	Now you decide which cards you want to keep. Click on them. If you have a royal flush then don't exchange any cards! When you think you are ready then click again on the draw button - you will probably get new cards.
Perhaps you do not get new cards - then the computer player has quite good cards (or at least not very bad cards) and he has raised. You have to decide to adjust your bet or to get out of the round. By default you will adjust your bet. Click again on the draw button when ready.
Raise 	 After you got new cards you are allowed to raise a little bit. It is the same as the bet phase so I don't explain it again. Click on the draw button (which is now labeled with see) when ready.
See / Draw 	I know I said there are four phases and this one is the fifth. But it is nearly the same as the draw phase. You will also see the cards of the computer player and the winning cards are blinking. The winner gets all money. Click on draw to begin a new round!
The blinking cards are not necessarily the best cards of that player. Only the cards which caused the win are blinking. So if you have two pairs (⪚ 2 * 2 and 2 * 3) and an ace, but only the ace is blinking, then the computer player also has these two pairs (2 * 2 and 2 * 3) but not an ace.