Base game concept is really well laid out with the tools, inventory, and buy/sell setups. Main issue I had was how water hungry the carrots were. I planted a lot in the beginning but I was not able to keep up with the water demand so most died. I was then stuck in a bad situation where I was doomed to not be able to pay rent because I ran out of carrot seeds :(. I think if you make the water requirements per plant not as harsh, this would be a great start to a farming game.
I also had a question about when plants get sick. What was I supposed to do? I tried watering them more, but that seemed to make it worse.
Overall, nice work putting together this little farming game.