Simple, creative, and truly excellent. I played a few rounds of it because I was excited to get better at it. I haven't beaten it yet, but I've learned something new ever time playing it.
My only constructive feedback is to change the visualization for the "throwing away and doing nothing" channels. In my mind I always imagined them doing something, but the lack of mining symbol wasn't enough to stop my lizard brain from pressing the button anyway! Not sure I have any brilliant idea here, but calling it out. ALSO, it'd be nice if the "throw away" channels were guaranteed to not be expensive -- naively I imagine that helping balance the game, but ya never know haha.