As many of friends have posted idea about pause button i have some advance option. 1)There should be two option while the building is being upgrade which pause and cancel. 2)when the pause button is pressed the builder the building remain inactive until the cancel button is pressed or builder completes the upgrade successfully. 3)When pause button is pressed no resources will be return back and some cost will assign to resume the paused task may be in percentage . 4)While the building is paused the builder can not upgrade the wall or remove the trees because then it will reduce the economy very badly . 5)There should not be more than one building paused. 6)And building which is paused and then cancel will only give 25% resources back. Think about it and vote if you want it in the game For eg you have two building with one upgrade duration of 4 days and one 60 min or smaller than bigger upgrading building and accidentally you upgraded the large duration building so then you pause the upgrade and upgrade the small duration upgrade while paused building will remain inactive. And there should not be more than one paused building.
