How do you qet pass level 17 on 100 doors on a iphone

Level 17 of the hit free game 100 floors is really easy once you figure out the sneaky clue.

You can see right in front of you that there are 2 blue buttons, and a steel ball which you can control by tilting your iOS device to roll over and push the buttons.

The trick is knowing which button to push and when ... and that hint is in the horizontal lines you see on the wall and the windows in the back of the picture.

There's a single line to the left, then a double line to the right, then a triple line to the left, and one more double line to the right; this is the order which you need to use to push the button with the ball.

Roll over the left button once, the right button twice, the left button three times, the right button twice, and the doors to the elevator will open, taking you to the next level.

At its initial release 100 floors came with only 30 floors/levels, the game currently features 90 levels with more still promised "real soon" (available from the update in the Apple App Store).

We can hardly wait for the next update!