Hi, I played the demo and it´s a very cool concept! I made a video about it, too:
Except for the lack of music& sound and some minor typos this game is looking very good and is fun to play.
I did not understand what the switches on the bottom right do, but maybe that will be explained in later levels? Other than that, I really like the interface and the animations of the attacks & monsters.
Maybe you could make the game window resizeable or even a full screen option (if that is possible with your engine).
And if you need help with the music, I´m always looking for reasons to make music in different styles:)