There are two possible ways of updating the mode of the match-3 level in the building.

Note: it will switch not only mode but also set of levels. 

1. Complete match-3 levels in the building except for the unique buildings (Ship, Cave, Sphinx and Pyramid) to update the mode. Match-3 levels will be switched automatically. 

2. Throw the Dice to change mode. Match-3 levels will be switched automatically.