Rules

You have 1 card in your hand
At your turn you draw one new card
You must always play one out of two cards
When you play a card, its text takes effect
In the beginning the undisclosed card stack has 10 cards
The game ends when all 10 cards are drawn or only one player survived
If more than 1 player survived the player with the highest card in his/her hand wins

How to play

There are 3 ways to play the game:

Play within the Email-Client: if your email client supports html-forms you can just press one of the two "play" buttons below the cards. Unfortunately some email clients think html-forms are evil and don't support them.
Play in the browser: click the link "Play via Browser" at the bottom of the email.
Play by reply: press reply and use the follow answer (keep the original email in your reply): x-y-z. x = card 1 or 2, y = (optional) target player number, z = (optional) target card no