Stencyl-nator topic update:

both above applies to the building object sensor(same behavior), when it hits a structure it prevents a new building from being build onto existing structures. when it leaves, it allows the new building to be build

and this is where "crapplay status - can build" goes to and "game attribute blank crapplay status"(below) should be the same as "game attribute blank - gameplay util"(above)

for

applies to building menu button

if this does not work properly please check actor group collision. One of the reason why does not work is.. they are set not to collide with any other actor. for more
https://stencyl-nator.blogspot.my/p/blog-page_10.html