Original Commentary

Yes, the sign says "Your level must be at least this tall to PQ". Joy's ears are, apparently, high enough level to do the party quest. It'd be cool if there were a game where your level determined how big your character was, like in those medieval allegorical paintings where person's height was determined by how important they were than how tall they were. Ah, pre-perspective art. But someone should design a game that does that - Terrence

Modern Commentary
In Final Battle Adventure Online, new characters look like nine-year-old children. Then as you level up, your character becomes an adult.

One of the things MapleStory had was non-instanced content. If you wanted to run one of the Party Quests (and you did want to, because it was the fastest way to get xp), you had to wait for the previous group to finish.

On one hand, it let people hang out and socialize. On the other hand, you might spend more time waiting to play than actually playing. - Terrence