He is also the editor, the director, the writer and the producer on this movie. Never mind the megalomaniac tongue-in-cheek credits: this is a great film. Many of the sequences on the stage are unsurpassed. For reasons unexplainable I loved the parts with the orchestra, maybe orchestra slapstick is something like its own sub-genre.
Definitely go and have another look at that for great slapstick! And although I do prefer the beautiful narratives of the later Keatons, even this one is already on an extremely high level.