Will poke around at this later, but it looks very cool at least X)

In addition to the default project - maybe also have a random/shuffle option (and consider having the default project randomized, or load from a set of curated random configurations). Maybe "random" could only be applied to parameters

And a slight bug report - the "[] Legend" box in the bottom right corner obscures error messages when a parameter "box" is missing a connection. I'd also consider having that highlight the specific node/box/etc. that's got an issue - if you make something very complex, you'll be scrolling around, zooming in and out, quite a bit to find the specific named object.

And a question - is there a way to delete an object?

(sorry if any of that sounded on the harsh side - was trying to provide constructive feedback with enough detail to be useful, but that length can come off "ranty"...)