When Clark flies for the first time to go see his parents in Smallville, he's wearing a maroon shirt. When he lands in Smallville, he's wearing a blue denim shirt. But in the next scene at the dinner table, he's wearing maroon again.
At the beginning of the episode, Lois arrives in a cab traveling right-to-left down the street in front of The Daily Planet (like a two-way US street). After Clark goes inside, all of the traffic (handsome cabs and autos) is traveling left-to-right in both lanes.
The bus that Clark gets off of at the beginning of the episode is the Metropolis Rt 36. It lets him off, then presumably pulls away from him. Moments later the Metropolis Rt 36 is out of control traveling toward Clark as he steps in front of it.
Clark looks through the wall of an aging theater which is about to be torn down. The wall itself has a door, above which appears "Enterance."
Clark's mother sews his suit together from normal earthly fabric, using her sewing machine and scissors. Only the "S" logo on Superman suit's chest is from Clark's home world, carried to Earth along with his alien baby blanket. However, in the rest of the episode and series, his suit is as impervious to fire, bullets, and other hazards as Superman is. This could be viewed as a goof, but Clark explains this later in the series. The suits are only indestructible while he's wearing them. This is due to an "aura" of power that extends a few millimeters out from his body.
On all other Superman series, Clark uses his glasses to hide his secret identity. However, on Lois & Clark: The New Adventures of Superman (1993), Clark wore his glasses prior to being Superman without having any reason for wearing them. This may be in deference to the comic version of Clark, who was at one point wearing glasses made out of a material salvaged from his starship, which was the only thing that was able to withstand his heat and x-ray vision.
As the bus pulls up, just before we meet Clark Kent, the hand print is already visible on the bus, before Clark stops it.
At the beginning of the pilot when Clark steps off the bus, he is carrying a battered old suitcase with his initials on it, even though he is only in his twenties.
Fortune cookies are an American invention. In 1993, they were not yet popular in mainland China, where Clark got the supposedly authentic meal.