Beautiful game. The music is awesome as well as the character design. The story also quickly pulls the player in. Looking forward to play the full game. I do think you can improve on such:
-Multiple weapons with tiers or shops to buy ammo or weapon.
-Player can go inside inns, shops, building ,etc
-There is no incentive to killing enemies.Rolling through everything to get to the goal seems to be the optimal strategy.
-The player cannot walk behind trees. This might be a design choice to avoid occlusion, but I think it subtracts from the illusion of height difference.
I am pretty sure of the things are already on your list. To be honest, I had a really positive experience playing through the demo.