A very unique combat mechanic and quite humorous. I ended up "preloading" my chords and just hitting the last key i the sequence when engaging the mob. I -didn't- do that with the dragon and died :(
Enjoyed the roguelike upgrades in between floors, was happy that I also found a merchant just when I was wondering what the gold is for.
Was a bit unforgiving in the sense that the mobs dealt a lot of damage and rather quickly while you fiddled with the sequence of chords.