Good game for what it's worth.
If your intention was to give the average person a little scare, and the easily shaken person nightmares for a week, you've essentially succeeded.
I personally saw it coming by the third card (the reading was becoming ominous to a fault.) The demon image itself could have been scarier. It reminded me of a really cheesy Halloween mask.
All in all, for the intended purpose, you did well. However, I think you should have at least randomized the first three cards. The interface was wonderful and could have worked very nicely. Perhaps you could consider working on a real tarot game.