Balance games are close games to stacking games because they share the same concepts. You will have to put different objects on a sort of balance sin such a way they don't fall. To complete a level they either have to stay a number of seconds in this position, or else they should never fall.
There are also games in which you must remove pieces without having building the building collapsing. This is the same principle as the board game Jenga.
In the balance games, you will have to be particularly careful and precise.