Kami's Fluffy Pixels

[Bombshell93]

theres some pillow shading (not particularly edge hugging but it does look like the view is the light-source which just seems wrong)
the slopes you need to treat it as an angled surface, as is, it looks like you've just skewed the floor along the angle.
Also in interest of design, typically 45 degree slopes have a but of a drastic slant to them, it often looks nicer to have 30 degree slopes (2 pixels to the side, raise a pixel, repeat)
I dug up an old template I used for tiles for platformers, I've not used it in a while but its quite expansive and I think you'll see the shape I'm talking about,
the sheet goes
Outer Circle,
Square / 45 degrees,
30 degrees,
Innder Circle,
etc. etc. etc.
WARNING: BIG SHEET! it was intended for the original Speedo Joe game, the graphics were going to be high definition but I was not a good enough artist and certainly did not have a team to pursue the project.

Spoiler

the underlined are the tiles relevant to you, the red is the angle I'm talking about.