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.
Ear Worm: Pick any song from the games. You can (and will) get said song stuck in your head.
Tropes of Croc: Legend of the Gobbos:
Breather Level: Level 4-2 "Hassle In The Castle" is considerably easier than the rest of the areas in the level.
Demonic Spiders: Whilst not spiders, Dantini Devils and Casters are literally and figuratively this trope. They are big, and shoot at you.
Scrappy Level: Ghost-bonuses, the levels where you need to jump onto tiles to kill sheep/ghosts/whatever, and, oh God, the swimming levels.
Level 4-3, which consists almost entirely of a marathon of mini-games. If you're trying to go for all the Gobbos, and you mess up a single game, you MUST start all over.
Most of the level 4 areas qualify with "The Tower Of Power", "Ballistic Meg's Fairway", "Swipe Swiftly's Wild Ride", and especially the last level before the final boss "Panic At Platform Pete's Lair".
That One Boss: Neptuna. A boss fight that takes place entirely underwater, AND he has the ability to shoot beams at you like the Dantini Devils.