-The concept is really cool, there are MANY characters and all of them are memorable, with good character design. Well done!
-Light hearted humor that works and delivers pretty well.
-Music is a bit repetitive after a while, BUT I didn't mind that much because it was great. Sound effects were cool too.
-I really like the dungeon crawling, although for a castle it feels awfully empty in terms of decoration. IT reminded me a bit of the lost child between Diablo and Touhou, but if you can some more tileset variation or decoration would be nice.
-Graphics for cutscenes feel a bit either dated, or incomplete although personally I didn't mind.
-I missed some skills can properly stagger the enemy.
-Although enjoyable, it was a long demo.
-The gameplay feels very polished, but some characters are seriously OP. while some others feel severely underpowered (Octavia and her knight friend are rather weak compared to Fiera or the first two characters)
Overall, I liked the demo and it's charming in many ways. It feels like a LARGE project with many enjoyable details, but I can tell it's going to take a lot of work to finish such a project. Keep going, nonetheless, you did great!