From the picture it looks almost done, but far from it! This was just a layout test. I need to redraw everything, make it smaller and find out the arrangement of the LEDs first. Some things have to be fixed in software, as the original layout for the IS31FL3731 is a 16 x 9 LED matrix and I intend to fold it on it self or rather turn both matrices by 90 degrees. That makes the data for the rows would look somewhat like that:
I do have to arrange it like that, otherwise the routing would turn into a nightmare!