The original idea came from the open source algorithm http://davebollinger.org/works/pixelspaceships/. I have re-written the code and added several features. I hope in the future to release the generation code as open source, enabling people to generate sprites at runtime from .crypix grids. This will enable the community to contribute and use the code for free (.crypix grids can be written by hand using JSON), or purchase the CryPixels editor if they wish.