Motris   Handy: http://mobile.GAMESforBRAINS.de/Motris.jad 
Motris
Arrange the falling pieces without empty areas!
Order is - like you know - half the way. Keep this in mind, because only the rows without space will disappear ...
Arranging new infos into already available knowledge - this principle of cumulative learning is shown in 2D: Relevant empty areas will boost your fall!