Its really fun.
I do think maybe adding a little more variation in combat, like new spells or more empahsized variety in your allies fighting styles could help the game feel a little less repetitve.
In the dragon boss fight, taking away the pillars and slowing down the dragons fireballs speed could make it more exciting, with a focus on dodging rather than hiding the whole time. Maybe a second phase for the boss fights two? The dragon could have one or two new attacks, like a flame laser or physical attacks like swiping the player? Maybe moving around.
Idk, you've done alot already of course.
I am a little annoyed by the secrets. You only have one chance to grab the first one, because if you miss it the prologue save point starts after its appearance. And some are really hard to find. I still only have 9 and I've been looking for like 45 minutes lol. Maybe having some kind of guide for them would be nice.
Oh and the rainbow wizard secret soft locks the game, you have to reload the page to get out of it.
Its a really good game, I like the story, the sprite work is beautiful, and though the enemy variaty is a little lacking its short enough that thats not really an issue. Great work!