Really enjoyed this demo. For the early state that it is in, it's already looking very very good compared to other games of this type in the app stores.
My two cents :Seeing how this is looking to be a phone app game the repetitive combat is fine and will be easier to do with multi touch screens than a mouse so it's fine as is. I think maybe being able to switch swords more conveniently would be something to look into. Something like a couple quick-swap buttons that you can custom set different swords into especially if some aspect of strategy with basic attacks versus special attacks or attack types is introduced later on. More so than the simple combat what was more grating for me personally was the repetitive flinch/hit animations of the enemies. All the humanoid characters doing the "stanky leg" just doesn't sit well with me. Also having the blank black screen for the defence is quite immersion breaking compared to the beautiful art everywhere else. I understand it's really early and i hope it's a temporary solution. Maybe even reusing the swipe mechanic for breaking blocks instead to defend against a special attack instead of many small attacks and without fading out to black. You could even say that the character is using their own shield and you are "aiming" to deflect attacks with the directional swipes.