Arcade USB Joystick - One button left

I was looking for a simple single button solution to replicate my all time favorite Amiga Joystick, Tomahawk by Greek company Aneroussis Control. (http://www.atropos-studios.com/External/joysticks/Tomahawk.jpg). Since I couldn't find anything close, I remixed this design to be with a single button, because that's all I need to play my all time retro classics.

P.s. Please note that most arcade usb joystick kits comes with big and small buttons, in this design it is used the smaller one. (Appro