Lost Treasure

Far far away from now,people found a treasure in the desert and they decided to hide it in a safe place,so the robbers and thieves cannot find it.Unfortunately,they lost the map to the treasure and can not get it back.They only way to find it is to get through those steel plate,put them aside and dig up these treasure box,those treasure are simply lying there,are you holding the keys to the lost treasure? To pick up a plate,simply tap it. Put it down by tapping a suitable place for it. Rotate the plate by tapping a neutral place on the board. Flip it over by pressing on the arrow keys or by dragging the plate outside the board and tapping it there.