Who ever have played the Black Jack, knows, that Black Jacks are falling from the sky...
... So just wait and catch your Black Jacks (21 points).
Two girls at left and right side are ready to strip for you, if you'll have a Black Jack (21).
Tiles with numbers are falling from the top. Collect the tiles at left or right side, to arrange the sum of 21 points.
When the falling tile stops at the bottom - drag it to the left or right side. Tiles values are summing, and when you have 21 at some side, the appropriate girl strips for one step. And so on...
Controls: When the tile stops at the bottom, drag it to the left or right side (mouse or finger).