[None] of [What's Up, Tiger Lily?] is precisely what used to be called boffo humor. No custard pies fill the air, and the climax contains no lunatic chase in break-away cars. Instead, Allen's sense of fun is at once low-keyed, far-out, and hip…. Allen's humor is without malice and without effort; and if some of his puns are terrible, there is an added fillip of fun in the realization that he is every bit as aware of it as we are.

Arthur Knight, "Fun Time," in Saturday Review (© 1966 by Saturday Review; all rights reserved; reprinted with permission), Vol. XLIX, No. 5, November 5, 1966, p. 45.