that ia the full version that costs money
And are you talking about the yen yang Ending??
If so:
1. press the button untill you get the screwdriver
2. Get the penal with the colors down
3. press green red yellow blue
Hope that help you and sorry for my bad inglish!
Btw at the instructions says "GRYB" so ya!
Well in the full version is "GRBB" (green,Red,blue,blue)
No, it's not. Bender is the robot from Futurama and he shows up in the ending where you have to use binary, that's in the free version. You get the "kill all humans" postcard when you put the binary equivalent of thirteen into the panel and a giant version of Bender comes and destroys the entire town. It says "kill all humans" as an easter egg because Bender isn't human. That's what they're asking for, not the ying yang one.