Everyone has their own understanding of authenticity so don't take anything I say for granted, and I could be wrong. There is some modern feel here like transparency in the background (or I only imagine that's what it was), and I think that movements of objects were smooth (not locked to pixel grid) but I could be hallucinating and who cares anyway.
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Oh I see, that's fair. I didn't take away from anything I read that there couldn't be more "modern" bits. My only understanding from the jam page was to make sure that it was 64x64 resolution but I can see how those other things could play into the authenticity. Thanks for the explanation and everything, I'll definitely keep that in mind going forward and for the next jam!