Put the red knob above the middle door and press the middle door twice. See related link for screenshots.
The object of each level is to open the door and proceed through it. On all the levels besides level one, there is a puzzle to solve before you can open the door. If you solve the puzzle, then the door will open and you can get to the next level.
Click the light switch on, then off, then on again, over again until all the green lights above the door are lit. Then open the door and go through.
Pull the pull chain, and then click on the door when it cycles through and is open. If you don't catch it, just pull the pull chain again.
Simply swipe the door following the lines above
Shake your device until all of the lights above the door turn green. Then open the door.
Tap the door to open it. Tap the area behind the opened door to proceed to the next level.
For this level, you have to follow the diagram that looks kind of like a G. If you try to draw the diagram on the door, you will end up sliding the door in the right directions: left, down, then right. Then you can go through.
Use the red pin from the previous levels and put it in the hole above the middle door. Then tap the door to open it.
Tip your device to the left as indicated by the picture above the door and the door will open. Congratulations...you just beat level 2.
Move the gates and balls so you can move the plant on the left of the door, then click the little white button. After that, slide the door to the left.
Dooors? Shake the device until the lights are on and open the door. See related link for screenshots.
Change 50 of the white dots to green dots then press the door. See related link for screenshots.