If you get an extra turn, and click your second card before the "HAHAHA try again" sound and animation finishes then the game freezes. Also I got the "Get behind thee Satan!" achievement when I lost my first game without using "deal".
But other than that, I really like this. The odds might be so stacked that it isn't even worth trying, but I keep coming back for another game. Atmosphere is great, love the creaks and distortions to the machine as you progress.