Tetris kind of game, need help!

Ok so Im making a tetris style game but instead of the shapes falling from the sky I have the screen split into 2 and you have to drag the shapes from the right side to the left side where the box is. How do I make it so that when you have put all of the shapes in the box and they fit perfectly it tells gamesalad to switch to the next scene which would be the level over scene?
Comments
However, if all your shapes are the same shape. I.e. all squares. Then you can detect the collision of each type. It's not strait forward and if this is your first time using GS you will notice a certain lack of "puzzle" connect-4, tetris, bejeweled style games for GS. That is because it doesn't have that capability built in very easily. It CAN be done. But man is it harder than it should be.