Again, congrats on the game, it was really fun.
About the clicking issue, I think you could basically make it nonexistent by having less plots of land to actually plant on at the beginning. You click a lot to plant on all of them, and then a lot to process all of the wheat (around 1.7k ish) into every processes, and then click a lot to sell them. If the player had less plots at the beginning, but could upgrade the amount he has later, when he already had upgrades to help him with clicking (maybe even with the tractor you wanted to have), it could potentially erase the issue. But just making he hold the button to do the processes would also be a way to fix it, tough the former is way more fun in my opinion, or you could just have both as well.