Simple? Really ?!
I stayed at level 3 for a very long time.
Not knowing how to do it and having discovered the video here.
I said to myself, it's good! I will be able to pass the level by reproducing the placements. Except that everything is going way too fast I have the impression and it does not happen at all like in the video. Why ? =x I like the game but it's starting to get critical.