Thanks for playing the demo and taking time to write down your thoughts!
Glad you like the game so far. There is absolutely an element of rhythm to the combat (partly due to rigidness and limitations of the web based game engine) that rewards well-timed attacks and careful spacing.
I'm aiming to release the full game this year with 7-8 areas and accompanying dungeons. Making steady progress. It would be faster if I didn't have a day job and a toddler to care for.