Also, one of the game developer's main focus was to give the player a feeling of accomplishment. In this case, the satisfaction of either being the world's most powerful and evil king, or putting an end to the demon threat once and for all. There's no way to know for sure unless there's a sequel.
Phalanx is the corrupted form of Long Bow Oolan, and is guarded by blobs with shields. Tower Knight is the corrupted form of the shield wielding knight of the tower, and is aided by enemies shooting arrows.