[...]when honestly a lot of the gameplay from my game is copied from SDV, which copied 90% of it's gameplay from Harvest Moon.
Yep, my pickaxe is closer to the Minecraft pickaxe. But the SDV pickaxe is 80% similar to the Minecraft pickaxe.
...and Minecraft was
*mumble mumble*% inspired by DF!
(I have absolutely no experience of SV. It looks like decent graphics[1], along the lines of most 'compromise map-tiles and sprite-tiles view'. As long as it can't be tagged as a (maybe hue-shift) direct copy, down to the textural dither-noise, you should be Ok. As mentioned, there's limited ways to use a limited group of pixels, and still illustrate a common item in a similar theme. There's going to be superficial similarities, and nobody can complain about those without the 'original' probably equally falling foul of the same degree of suspicion w.r.t. something else.
)
[1] I'm a little concerned with the character-sprite. There looks to be a vertical 'cut', or maybe slice-out[2], to the RHS that affects the face, shirt,
maybe trousers[3], but lets the hair, hand and shoe poke out. I don't know if you can put a pixel or two more skin on the face[4], but definitely some more 'rear' arm[5] poking out
[2] Only the highlight of the hair belies the possibility you lost an entire column two pixels in from the rightmost shoe pixels. Possibly from an inconvenient
near unity, but not quite integer, rescaling/resampling.
[3] There's a border/outline there, which is missing in the shirt.
[4] Without making it look like Pinocchio, but cheek (if not nose) over some of the hair, which might give you other problems as it covers the slightly bright hair-highlight that stops the hair
almost blending into that ground-colour (but not enough to concern me).
[5] Maybe a heavily vertically-axial backward dihedral stance (i.e. both shoulders well back and chest proudly forward) would explain the lack of it. But it looks odd to me. And can I just say at this point that
I don't have an artistic bone in my body, so quite probably I'm not properly understanding from this sole screenshot what
may look entirely contexualised by its active animation if you have it walking around (this is just an unortunate snapshot moment).