Difficulty with Ubuntu and Flash Player

Using Ubuntu 14 operating system on a 32 bit computer of undetermined make.  I need Flash to download and work on this system.  It isn't.  I have downloaded Opera, Mozilla,Epiphany, something called browser, and  Chrome in order to be able to watch videos and play Good Game Studios Big Farm.  It doesn't work.  No matter what I load Flash in. Mozilla  claim that Flash has security issues which I can't override.  For the others it says it downloads and the tester on Adobe says it has loaded but it doesn't work.  So what are my options?  What else can I do to make this work