Great Job. I really like the graphics. As a person using a laptop with a track pad I would recommend adding an alternative keyboard based option for the sickle; eg 'J' and 'L' for left and right respectively. It was also a bit hard to tell if the animations for harvesting and the score are in sync as its hard to visually tell if i hit the crop or not.
Edit: After playing it again with a proper mouse the controls feel great. On thr track pad it didn't really track long presses well so the game felt less responsive. I would recommend adding a move up and down mechanic cause it's borderline impossible to get the bats and the window of opportunity to see the harvested stalks is very small.