This is a very high quality game, it's crazy you're offering it for free, and not just as a demo for a steam game.
I love the simplicity. It's a unique concept I haven't seen before, and somehow intuitive enough to not need a tutorial. I think the sounds and graphics make it worthwhile to invest the effort to work out the rules.
It reminds me of mini metro the way it slowly zooms out as you complete more of the level. Although sometimes the new nodes spawn very far offscreen and you can only slightly see them.
Are you still developing this? Or have plans to put this on steam?