A very interesting and introspective little adventure.
The art kinda threw me off a few times. I didn't really understand why some of the characters were in colour and there rest were black and white. Same with the objects and environment. Everything felt a little mashed together and off style? If that makes sense. Like a bunch of different artists mashing together their stuff. Especially the heart sprite.
To be clear the art looked good overall and as a pixel artist I can appreciate the work that goes into it. It just felt a little off.
The narrative was interesting although very short it got to the point really quickly. I was reminded quite heavily by some scenes in Celeste and other titles that feature introspective characters with physical embodiment of their darker selves (shadows).
The audio was fine but some different music or SFX would have been nice, especially during the closing fight.
I liked the shadow mirroring my movement that was a really nice touch, however I could just spam attacks to wipe out their attacks without taking any damage so it was pretty easy to beat.
Overall it was an interesting experience It would be interesting to see how the concept would evolve given more development time.