Best executed combat of any games I've had a chance to play in the jam (roughly a quarter of them). I really liked the fluent chaining of moves. I might have to steal it for something.
Artwork was also great. I know you said elsewhere that you felt it was "amateurish", but consistency of style is more important than the quality of any individual piece, and the pixel art combined with the music selection and the background effects all play off each other here to great effect.
I'm not really picking up on the duality theme. It is there a bit in the backstory (real world protagonist, with this ability to to enter a digital world, but that doesn't come into play in any interactive manner.
Well done.