This is a game controller for retro Atari and Commodore computers and consoles. The right most button is linked to up so you can have a "jump" button for jumping games like Gianna Sisters on Commodore 64. The other button is fire/action and of course the directional buttons on the left side. You will need to send the Gerber files to a PCB manufacturer to get made. I got 5 boards for $5 plus shipping from JLC. You will also need:

-6 tactile switches with caps (6x6x9mm)
-DB9 female right angle connector
-Joystick extension cable or serial cable with one male and one female end
-4 M2x7mm screws for the case

Bend the legs of the switches down against the board before you solder them. After you solder the DB9 connector you may need to trim a little off of the bottom to get it to fit properly in the case.

The cap that goes over the DB9 connector is optional. I like the look of it without it. Enjoy!

Creality

Ender 3

No

Yes

0.2

20%

Support just for the recessed screw holes on the base.

KiCAD and FreeCAD