These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Anti-Climax Boss: Darkseid. How do you fight an essentially immortal alien god? By punching him out and throwing him into a holding cell so he can be arrested by the authorities.
Oh, and this is a virtual world. NOTHING YOU DO EVEN MATTERS!
Awesome Music: Yes, the game sucked, but the music is actually kind of catchy.
The ending music was pretty good, fitting the tone well.
Badass Decay: Even in a virtual world, the decay of Darkseid is inexcusable as stated above. This is made even worse by the fact that this game is based on Superman: The Animated Series, in which Darkseid nearly killed Superman each time they fought, set in the DCAU. And Darkseid is, without a doubt, the most evil and powerful villain in the entire DC Animated Universe.
First Level Wins: The rings are so iconic, and so difficult to traverse, that most playthroughs and reviews of the game don't actually go beyond the first level; many people aren't aware that there is more to the game than just flying through rings - not to mention how what comes after the rings is arguably worse. ProtonJon, the person who has arguably done the most to challenge this assumption, has said that this was part of the reason he wanted to do a Let's Play in the first place.
Proton Jon: The Superman LP has led to edits on the TVTropes entry for Superman 64. My work here is done.
Another Youtuber- Dark Lord Jadow 1- played through the entire game for a three-part review, also covering the tie-in comic for good measure. He also discussed the fact that the indoor levels are far worse than the ring levels.
Dark Lord Jadow 1 also discussed the game's multiplayer mode. Most players are unaware the game even has a multiplayer mode. (The multiplayer mode sucks too)
Good Bad Bugs: Numerous. Some of which can actually make the game easier (such as being able to ignore hostages you're supposed to save, which allows you to win a level) or significantly more humorous (an enemy shoots at the camera man in the level featuring Metallo, before the stage even starts whilst showing your goal).
They Just Didn't Care: The game is so bad designed that it is almost a Beta: among other problems, we have problematic controls, that pink background deliberately put there to cover glitches, the police station is just a gate, and the houses and small buildings are painted on the ground. And it's thematic is well limited: the game consists on flying through rings, towing police cars away from danger, flying through rings, fighting the bad guys, flying through rings, destroying tornados, flying through MORE... DAMNED... RINGS...Welcome to Hell.
Signature Scene: The infamous first level where you fly through rings. There's actually much more to the game, but this is the part that everyone knows.
So Bad, It's Good: Depends on how you look at it. In particular, ProtonJon notes that it can be fun to try and discover as many glitches as you can.
That One Puzzle: In the final level of the game has a puzzle where you travel through portals aboard Brainiac's ship. A number in the middle of the screen changes whenever you go through a portal. The puzzle ends when the number equals 2000. Sound like a simple puzzle? It is... except this portion of the level is heavily glitched so that you die at complete random.
Using a Gameshark to give yourself infinite health isn't even enough to get around this glitch.