This game has a lot of potential, I could see it being expanded a lot! Here's some of the feedback I'd like to give:
Making it so that you can hold click and slide to till / harvest / plant multiple tiles, instead of having to click each one individually.
Adding sound effects, of course! Even some simple ones can greatly improve the experience!
Maybe add a gameplay element that makes the player want to farm more? Maybe some periodic payments, or something like balatro! (But this one's more of a suggestion than anything)
Overall, the pixel art is quite nice, although having different sprites for the different stages of development of each crop would be nice. Good job on making it to the jam!!