I've got to ask.... What makes Valanice the only one who can do the puzzle, when Rosella is of the same blood lines? To me, there's nothing truly Valanice-centric about that part. And, really, 4 mouse clicks (aside from the puzzle itself) don't mean a character is uniquely "playable". No more than the two clicks performed as Boogle really made him a "playable" character in the final level of Torin's Passage.
I liked the concept, but a mere puzzle as Valanice left me longing to actually play as her, in any world - even if just walking out into Rosella's dream world for a couple of minutes, with Amy telling of Valanice's maternal or autohistorical thoughts, like how she was remembering things long forgotten.
(Yes, those are puzzle-related comments. So I put them here, not in general feedback.)
And, the Amulet, just like the "Dodge" comments, tends to leave little time to actually click them, even if you're ready, in Ep3 and Ep4. Maybe adding a 1- or 2-second delay would be a good idea.
Since the Amulet will be in Ep5, how about some opportunities to play with it outside of battle? As much as I enjoy RPGs, they rarely let you use the characters' abilities freely. Really, I can only think of the Mario & Luigi series which allows you to do that - like randomly throwing fireballs and electricity, without the strict Pokémon Hidden Machine type of rules (Whirlpool can only stop whirlpools, not randomly start them in calm seas.)
(Still a battle/extra-battle question and explanation.)