Colour Blind article on the Nitrome Wiki: http://nitrome.wikia.com/wiki/Colour_Blind
Level 21 of Colour Blind. This one shows how to get the stone tablet placed at the bottom of the level.
Ending with the camera: http://youtu.be/uOKPYS5UCd0
I don't cut anything out of the video. Click the Nitrome Wiki link above to read about unused content in Colour Blind. (if it's not there, it's coming quite soon)