If you didn't read the last section of the EULA (which you should have), then I'll repeat myself.
The EULA is a joke. It isn't real, so don't take it seriously. Do what you want with DoorOS (besides copying it and calling it your own, of course). Remix it! Share it! It's a Scratch project. I don't care. Just don't share it and claim it as your own.
Have a good day!