The controls are the real troll here :-D not the boss at the end!
Not sure why the choice was made to have the player move in fixed X/Y axis (isometric) and not be able to rotate freely? When you're using 3D models with animations it seems like you would make full use of that ability.
As for the theme, I'm not sure that collecting an item after being instructed to do so to progress really counts? Isn't that just, well... normal gameplay?
I got teleported to a room with the boss and I couldn't move and died instantly.
The graphics used are nice, and if the controls and gameplay were refined into something less frustrating this could be a nice little game...