Solid work, Pixel Art Environment and sound fits very well and gave a nice feeling.
I would recommend to choose the key from the keyboard as attack button otherwise the player thinks there is a dependency between mouse and attack direction, which isn't. And yes I read the notice about the behaviour in the description, but it feels unintuitive. Or you could align the weapon around the player depending on the mouse and attack into that direction. That will give you more control about the direction, cause I had many trouble to attack with the spear on a crab that stands all the diagonal to me, without running into it and get a hit.