El Testigo is secretly Jonathan Blow, the developer of indie hit "Braid." This game lists him as "From That One Movie," refering to his appearance in Indie Game: the Movie. His attack is a ball of programmer code that can alter the appearance of any terrain it comes in contact with and can be used to slow down various moving objects. Testigo can also jump on enemy heads to destroy them. El Testigo was most likely put in the game since Blow playtested 1,001 Spikes. This also explains his name (TESTigo), as well as the fact that "El Testigo" is "The Witness" in Spanish--The Witness (2016) is an upcoming PS4 indie game being developed by Blow.