loved the game and the sheer quality of everything!
now on the demo, I think you could add more directions (I took a while to realize blue and yellow were mana for the weapons, which is kind of important when you start and waste all of it without noticing) - while writing I noticed I accidentaly skipped the tutorial and just pressed A to get the key (do with this information whatever you like)
the indicators were also a bit too far from eachother, hp bar on the left corner, counters on the right corner, and character middle bottom, makes it very difficult to pay attention to everything in a fast situation (you'll just start ignoring at least one).
also, I think the camera can be a little more centered, specially near the bottom or you almost lose sight of your character (maybe you can just fix it by extending the map terrain at the end)