Adventures of Lolo/YMMV


 * Anticlimax Boss: The Great Devil in the first game; after clearing the 50th stage, Lolo defeats him in a cutscene. His reappearance in the second game is upgraded into a proper boss battle.
 * Ear Worm:
 * The main theme will not leave your head EVER.
 * Even more Egregious in Adventures of Lolo 3, which has multiple overworld and pre-level themes (both of which combined make up about 5% of the game), but still only one level theme.
 * The Japanese Eggerland games have several level themes which can be this. Especially the water/tropical-themed stages.