Failed miserably. No idea which key to press for harvesting. :D
I think a small tutorial would be needed and losing the game is also unnecessary in a farming sim. Just give the player a regular income and even after going bust, they can continue.
It's not clear to me why running around by keyboard to plant stuff should be more fun than in other farming sims where you do this comfortably with the mouse and the graphics is HD... so I don't yet see the original concept... but I'm not into farming sims anyway, so I can't help too much, I'm afraid. Sorry! ^^;