Great news, glad you got it going. If you haven't already, check your B+ voltage.
As for your game pcb, that's not really my bag but I would suggest lifting, cleaning and reseating your ROMS. This can cure a multitude of problems on DK/Jr boards.
It may well be worth doing that to all socketed chips, be careful when putting them back in their sockets though as it's easy to bend/snap the legs.
Good luck