A series of adventures in which the PCs protect the royal family (especially the Princess) and their interests. Good variety: plenty of (winnable) combat; other skills tested; some strategic decisions to make. The nature of the quests leads to (mostly) similar endings, but different NPCs may get involved, with different fates. Replay value.
Would have benefitted from a further edit: for example on p. 26 you are told a certain NPC is alive, but in the next mini-paragraph he is declared dead; bullywugs suddenly become goblins on p.99, Part 43. A jousting tournament could have been a nice addition; also a formal ball with dancing skills tested, and verbal sparring.