Hi, great mod,
Small issue, it seems the sprite sheets are misaligned by about 2-4 pixels
You can see the bug visually here: https://i.imgur.com/OCf8DYI.png
It think the horizontal blocks are 2-4 pixels too wide. So two lines of pixels get included in the wrong part of the 768x768 or the 384x384 sheet.
Suggested fix to spritesheets: https://imgur.com/a/1gIM7b0 recenters horizontal blocks, then removes the extra width to make them fit.
