Liked music and sprites a lot, slashing enemies was pretty satisfying and weapons seem balanced, and the different enemies are also nice.
If you leave a room without killing enemies they remain active and don't reset positions, so if you don't kill them all in one room they will hit you just when entering(you can also slash them from the other room but that feels odd).
Regarding the walk speed I think you could keep it if you add some relatively long coyote jump time so it does feel more responsive.