How do you beat level 21 of 100 floors
Floor 21 in the hit new game for Apple's iPhone (iPod Touch, and iPad) and Android devices, 100-Floors is an amusing one because it's actually possible to solve it completely by accident.
When you look at the design on the door to the elevator you may see what looks like a closed eye, unless you are holding the iDevice straight up, in which case you should see an open eye; this is what you need to see to solve the puzzle.
Hold your iPhone straight up, the eye will open, and one by one the lights over the elevator will turn yellow. Once they've all turned yellow, the door will slide up, and you're on your way to level 22.
Make sure you get the latest updates to the game, as of May 26, 2012 the newest version is 1.2 and it contains levels 1 through 55 (when you upgrade, your current progress will be retained, and you can continue from there).