Very cool! It really feels ethereal, every moment of it felt like I was in a dream (like the title!). The art direction and sound design on this is phenomenal! I only have a criticism on the gameplay: controls feel a bit sluggish, as I noticed a bit of slide and slight delays here and there. Also, the controls were a bit cumbersome on keyboard, but that may be the fact that I'm left-handed on pc, tho I would've liked to be able to have an option to attack with Mouse1 on the direction I was facing.
As for the boss, the attacks are well telegraphed and fun to dodge, only thing I would've liked was more boss variety.
Overall great game!