Really nice and creative idea! Only observation that I have is that I've found myself doing nothing since it was the best strategy to get everyone out and everyone in! But besides that, great idea and I loved the art :)
Thank you! Yes, the balancing was difficult to get right. Especially in the early rounds, sometimes doing nothing gets you a perfect train. I figured it would be better to let the player figure out the controls first before sending out the large crowds :)