What is most difficult in flash?

The most difficult thing in flash is getting scenes to work or items to move along with going from scene to scene. The most annoying thing in flash is trying to figure out why half the stuff you apply in your game wont work.It takes forever to get something to work either it wont work right or you cant get the butons to work or actions to work or getting the layers to not mess up because it is so confusing and is easy to mess up.