Allow me forking to directly attach C64 keyboard?

[nobruinfo]

Dear Adafruit

You're doing excellent stuff, not only for the Raspberry Pi community. I have a first version on my device running supporting
a C64 keyboard and two joysticks to be directly attached without the use of an additional controller, unlike the project
over at https://github.com/dabonetn/C64USBKey/ . Actually it's a mix of both codes. I'll have to ask there aswell.

Would you prefer me forking your project or would you agree to me dropping the altered code into my repo
https://github.com/nobruinfo/retrogame/tree/master ? You could check there because I described it a bit in the readme.
Forking here might be misleading people using your code to freely use GPIO as my additions merely need most pins
for the C64 exclusively.

I can't find any license (file) here. What should I use to comply to your company's terms?