Hi, how do I design my control panel? I only know want it for 1 player. How do i know how many buttons i need and where?
I am wondering why you are deciding to make a control panel if you don't know how many buttons you want or need and are not sure about the layout. The only reason to make your own personal control panel is because you want something that isn't available for purchase, want something custom etc.
Since you don't seem to have a preference I would recommend just getting a standard X-arcade stick. I know you said you only want one controller but you will regret that later, trust me, there is nothing more boring/dissapointing then watching someone play a fun arcade classic like Alien vs Predator and not being able to jump in and play even though the game allows it.
If you want a single player experience get one of the many handheld devices that are open to emulation, like Dingoo or Game Park X.