NDLZ - The Sixth Prime - Assets

This is my first posting of assets.  I am gauging interest and would be happy to expand and complete, or modify characters, environments, tile sheets, or scenes.  Looking for constructive feedback to apply to hopefully more future postings. 

Of particular interest might by the tile set prototype design I hope to invest more time into to perfect.  The goal is to have a unified universal tile sheet that provides flexibility and diversity of materials while incorporating prototyping tools to quickly discover use oversights and increase quality in application while quickly prototyping.  This should allow level designers to be unblocked by the graphics development pipeline and retroactively apply various materials to levels.  Additionally, the design considers scaling from pixel art to UHD assets.