An Untitled Story/YMMV


 * Nightmare Fuel: The purple ghosts- doglike purple beasts that are invincible, appear randomly, and their appearance is marked by the screen turning purple and the music changing.
 * The Bottom. No enemies, only a white background and wooshing "music". And no way out other than the save point.
 * Awesome Music: The music in this game is very good. It's a shame nobody's posted the music on Youtube.
 * Disappointing Last Level: The difficulty shoots way up once you reach, and stays there. Also, the gameplay quality seems to decline a bit.
 * Plus, that's around the point where you stop getting ability upgrades and instead just get near-useless Gold Orbs for completion of an area. Needless to say, the game begins to get rather boring when every single area ends with "Ooh, I wonder if I'll actually get an ability this time around...no, it's just another orb. Yipee."
 * Goddamned Bats: Any and all ghosts. Also the laser turrets in FireCage. Most of the enemies are pretty easy to deal with, though.
 * Goddamned Boss: The boss of Skysand. Its "Bullet Hell lite" isn't too bad, but you have to defeat it by making its floating sword hit its body, but the sword's attack phase occurs in long intervals, and the body is hard to hit. And every time you want to fight it, you have to traverse a few rooms which require some training to get through unscathed and in which everything deals heavy damage. It feels very satisfying to finally defeat it, though.
 * The boss of the Curtain,, fits this trope to a T. He's not too difficult to defeat, but dying to him means you have to go back through multiple screens of difficult platforming because of the Check Point Starvation in that area.
 * Hell Is That Noise:
 * Most Annoying Sound: The sound when you get hit.
 * Most Wonderful Sound: The save point jingle.
 * The sound of the heart doors opening.
 * Paranoia Fuel: After a certain event occurs, there is a particular type of enemy that can appear out of nowhere at any time. It is large. It is invincible. It chases you regardless of where you are on the screen. It passes through walls. Its appearance is accompanied by the screen taking on a shadowy purple tint and the music becoming creepy. About the only (admittedly, large) comfort is that you can get rid of it by simply traveling between screens.
 * Actually, two events can cause that enemy to start appearing.
 * If you're playing on simple, the ghosts will never appear  so there's nothing to worry about there.
 * That One Boss: Some of the bosses are pitifully easy. Some of them are... not.
 * Dark Red and Fluffy in particular. In order to beat Dark Red, you need to deflect two (or more, on higher difficulties) of his fireballs at the same time. Which is only possible if you're two platforms away from him, and it takes a bit of practice to do that. And even then, you can only let the shot loose at the last second. Not to mention he's in a Blackout Basement... Also, Fluffy. Wouldn't be so hard except for the fact that you can only stand on a few small platforms that constantly fall when you're on them. And falling off makes you suffer huge damage. Injuring him is no easy task either.
 * is no fun either. Little twerp keeps teleporting in right on top of you to wing his gear shuriken at your head, and the ground below your little platform is spikesville.
 * StoneEye. Have fun dodging a ton of projectiles and energy barriers in a shaft that's only a few times the width of your sprite.
 * FireMachine. Try jumping through gaps in an energy beam when there's four of them at once, some that open and close rapidly. And a bunch of projectiles, too.
 * That One Level: The final dungeons, full stop. Aggravating, especially difficult spike mazes that dish out huge damage and are tough to see, let alone avoid, and a very small number of save points means that even the slightest mistakes will cost you dearly. And on harder difficulties, there are even fewer of them.
 * The Curtain also qualifies, especially if your platforming skills aren't up to snuff. The slightest mistake will set you back several screens. The challenge of the area combined with it's Check Point Starvation will make you want to tear your hair out. It doesn't help that the area is pretty much just as hard on Simple as it is on Difficult.