how do you pass the ying-yang level on 100 floors, level 71

For Level 71 of 100 Floors notice the Ying-Yang symbol in the center of the door, that shows how the etching should wind up around it; opposite of the one across from each.

The simple solution can be seen if you tap one of the blank space repeatedly and match the etching displayed to the ones around the door.

If you watch closely the first tap matches the mark on the floor in the center. Another tap matches the etching to the left of it. One more tap matches the mark after that...

So if you follow that logic, the top left blank needs to be the shape that one more tap would show.

The top center blank is the shape after that, and finally the top right blank requires one additional tap.

Put simply: tap the top left blank space 4 times, tap the top center blank 5 times, and tap the top right blank 6 times to solve the puzzle.

Level 71 is part of the June 12 update to the game which started with only 30 levels when it was released for the iPhone, iPod Touch, and iPad in early May.

It now has 80 levels, with more still promised for the near future; a port for Android models has just been released.