Yeah I feel like we need some decent understanding of neural networks to have more context on this. Its kind of like being given a specialized shovel but not knowing why you need it or why you should dig holes.
If you're expecting a lesson, you'll likely be disappointed, but I think there's real value in a true playground.
I think the biggest improvement would be if, when hovering over a 'neuron', you get a visual representation of what feeds into it.