Euphoria is another LWP adapted from "Really Slick" OpenGL screensavers for Windows. Unfortunately, this one didn't even bother to acknowledge the source.
Also, based on the actual package name, there is no "Go Wallpaper Dev", but rather a bunch of Chinese authors just decided to throw their names together.
I doubt there's anything bad about that, but it's still a bit shady.
Rating: Try it