To play the Oppaimon: Special Christmas game, you select the girl you want and then avoid the ball. You use the arrow keys to play the game. Sometimes simple games like this can be so much fun because you don’t have to overthink anything. It’s possible to kick back and enjoy playing the game for what it is. While you may find this game easy to learn, it can be quite challenging to master. That’s the lure of the game, and it’s why you’ll come back to play it again.