Presentation: 10/10. I think the graphics in this are frankly amazing for the engine, let alone a Game Jam entry. As someone who works with this engine there are certain assets and effects that genuinely took me awhile to figure out how you achieved them. There is truly nothing to critique here. Wonderful job. Music is fitting but it didn't really stand out to me much, which isn't a bad thing, as I'd rather have inoffensive background music then something that actively pierces my ears. The animations are also spectactular and really ooze style. In summary you make me envious of your graphical capability.
Gameplay: 6/10. I really wish I could rate this higher but frankly there are a few things that drag down a really great system. The small health pool and high damage really makes combat frantic and not in the way I was hoping for, this in combination with potions being so plentiful, but healing so little meant that combat devolved very quickly into spamming potions and desperately trying to think of which attack is most ideal (which in most cases was the fireball). I do think this could be changed rather easily by making the player's health pool larger, but making potions more rare and heal more. I also felt a lot of the utility spells got thrown by the wayside due to how frantic everything becomes.
Story: 7/10. I like the overall idea of the plot but I think it rushes forward so quickly I was often lost as to what I was doing and why in the world I was doing it. Perhaps some more filler dialog to help establish things might aid in this as really you only talk with one other character for the majority of the experience. When I was able to comprehend what was happening I thought it was quite cool and I was able to immerse myself in the game's scenaro.
Overall I think this is an already great game that could easily be made even better with an update or two.