Putt-Putt/YMMV

• Angst? What Angst?: Owing to animation errors, Putt-Putt has a tendency to keep his smile when reacting to bad news.
• Demonic Spiders: Virtually every enemy could qualify in Putt-Putt and Pep's Dog on a Stick without unlimited lives on, but the beach balls and the hedgehogs are the worst. The beach balls can only move downward, but they make up for it by moving exactly in the direction you never want them to, and the jumping-through trick mentioned below doesn't even work on them. Oh yeah, they also infinitely spawn again once they fall, meaning you can't get rid of them. The hedgehogs are stupidly fast and actually outrun you, and since they don't hop straight up once before going to another space, you never know where they're going. They're also really difficult to get rid of on levels that have switches to trigger the appearance of platforms. While you can jump through them, they're likely going to come right back and get you anyway.
• Ear Worm:
  • "Putt-Putt, save the zoo, Putt-Putt, save the zoo, Putt-Putt, save the zoo, Putt-Putt, save the zoo..." And it goes on and on and on.
  • Some of the in-game songs could also qualify, particularly "The Zoo Song", "The Time Continuum", "Go Putt-Putt", "Under the Big, Big Top" and "I've Got a Secret".
  • The intro song to Putt-Putt Goes to the Moon.
• Ensemble Darkhorse: Rover and Mr. Firebird, to an extent. Both are well-liked characters, but they didn't receive much attention. Rover is a big side character in Putt-Putt Goes to the Moon, but his only appearances afterwards were working at an ice cream shop in Putt-Putt Enters the Race and Putt-Putt: Pep's Birthday Surprise and attending the party at the end of the latter game. Mr. Firebird wasn't treated much better, as he only shows up in the beginning and end of Putt-Putt Goes to the Moon and Putt-Putt Travels Through Time, in the Putt-Putt's One-Stop Fun Shop storytime coloring book story A Visit to Mr. Firebird, and in the Tie-in Novel Putt-Putt: Lost In Time (he's also mentioned by Putt-Putt in Putt-Putt: Pep's Birthday Surprise, and his factory/lab is the setting of Putt-Putt and Pep's Balloon-o-Rama's Levels 21-30).
• Good Bad Bugs: In Putt-Putt and Pep's Dog on a Stick, if you jump towards an enemy at the same time it jumps towards you, you can go through the enemy. Especially useful in levels with one-square wide paths.
• Memetic Mutation: Tippity-top (from the UK dub of Putt-Putt Enters the Race)!
• Most Annoying Sound: The "falling whistle" in Putt-Putt and Pep's Balloon-o-Rama that plays every single time Pep falls. Prepare to hear that a lot throughout the entire game.
• Older Than They Think: Few people are aware that Putt-Putt Joins the Parade and Putt-Putt Goes to the Moon were originally on the MS-DOS and not Windows.
• Periphery Demographic: The back of Putt-Putt Goes to the Moon's packaging says outright that the games have adult fans.
• Scrappy Mechanic: The vegetable picking in Putt-Putt Enters the Race. It's incredibly slow, tedious, annoying, and the fact that nothing can be skipped does not help anything.
• Sequelitis: Putt-Putt Joins the Circus is considered a big let-down, especially being Humongous' last Putt-Putt Adventure Game. It had no replay factor, a storyline that could have been executed much better, and dull and undeveloped characters. And then along came Putt-Putt: Pep's Birthday Surprise.
• Suspiciously Similar Song: In Putt-Putt Saves the Zoo, the music that plays in the calm spot reached from the rapids is based on "Dueling Banjos", as part of a Parental Bonus Shout-Out to Deliverance.
• That One Level: Putt-Putt and Pep's Balloon-o-Rama is debatable on this subject, but Levels 61-70 and 101-110 come to mind, the former mostly because of Level 69 mentioned below, and the latter because the levels in that scenery take forever to finish.
• Unfortunate Implications: Level 69 of Putt-Putt and Pep's Balloon-o-Rama has pink balloons arranged in the shape of a heart, which soon fills up with white balloons. Ironically, it's also a That One Level for many due to the fact all balloons regenerate after popping them. Three times.