The Loading zone is a puzzle game, in which you will by tasked to load up 4 different cars with boxes of different shapes and sizes. As you progress trough 84 preselected randomly generated loads you will by presented with different types of boxes. Some of which have a special conditions of placement, such as "HEAVY" which can not by placed on top of other boxes, therefore you have to think about arrangement where all boxes marked as heavy must by placed on a floor of a car. As you progress in the game difficulty will by increasing by combining boxes with different placement conditions.
Part of a game is also "Random Load Generator" where you choose which car and which type/types of boxes would you like to play with. After you make your selection your load will by randomly generated from all possible combinations. Thanks to high number of possible outcomes it's safe to say that you will by presented with new puzzle each time you play. In the Random Load Generator mode difficulty of loads are unpredictable but all of them are completable.