Hi! It looks like your project is missing a ton of files related to package search and such. These files are automatically generated when you upload the extension through Makecode and create a release of it. You would need these files for Makecode to be able to find the extension!
This code maps out the distance from a sprite or tile (depending on the metaball type) and calculates the influence of each metaball on every pixel. It blends the colors based on distance, creating smooth, blob-like shapes that merge and interact with each other.