This project, which seems interesting, would greatly benefit from a better explanation of what it is, and some screenshots.

Isn't the opening paragraph perfectly fine as it is? It was the first thing I read and I feel like I understand exactly what it is:

> Seed is an interactive software environment. With it you can create and use computer programs in many ways. It is based on the Common Lisp language and runs inside the Web browser, allowing you to build software on a local or remote computer system, and it can present programs and their output using a wide variety of display modes.

An environment for creating programs, that you can use locally or remotely, and it can show programs and data in various ways.

True. Even the tutorial is just a wall of text