Hi, thank you this is great feed back I obviously need to look at the UX here. You (currently) double click the background to create new nodes. There are reasons for this but I may need to rethink it.

I will also think again about having input output nodes on the canvas as it does solve some issues. I however prefer the visual metaphor of having them floating at the edge of the screen.

I am considering making it zoomable / pan able but in someways I like the restriction on complexity. I want to encourage people to create "sub-graphs" instead of add more nodes.

I know its not far from perfect yet but EtcH is designed from the ground up to be a "language" rather than a way to wire together pre-defined nodes. Im glad its those innovative parts that you like :)