Its an interesting card game developed for iPhone/iPod touch.
First of all there are three cards on screen. Two cards are open and one is closed.
You just need to open (flip) a closed card.

Play Game:

If you want to change both open cards then press "Change cards" button.
You can select a bid by slider.
Then you have to flip the closed card.
After Opening a closed card there are two case either you won or you loss.
After each 5 round you can publish your score to facebook and/or twitter.

Bid:
You can select a bid by vertical slider.
If you win then your score is increased by your selected bid.
If you loss then your score is decreased by your selected bid.
You can always change your bid after each and every round but not compulsory.

Result:
Won: If that card is between the two open cards then you win.
Loss: If that card is not between the two open cards or exact the same card of the two open card then you loss

Order is like : A , 2 , 3, 4, 5, 6, 7, 8, 9, 10, J, Q, K (Colors of cards are not matter.)

For Example:
First OpenCard is "3" and Second OpenCard is "9"
Now, if your ClosedCard(after flip) will be between 3 and 9 (i.e., 4, 5, 6, 7, 8) of any colors then only you win.

On result you have a two choice,
1) Next Round - It will continue the game and updates score and wins.
2) Restart - It will start you with first round and score and wins will be reset to 0.

Flip Open Cards:
If you want to change the two open cards then you can flip both by touching Flip cards button.
You can only use this button twice for each 5 rounds.

Publish Score:
You can publish your score to Facebook and/or Twitter.
You can publish your score after each and every 5 rounds.

source : itunes.apple.com