Hi!
Thank you for your honest feedback, it really helps us identify areas for improvement!
I initially wanted to keep a single key for both actions to make the game accessible for very-casual player. There's a bug and you need to repress a direction to spell. I couldn't fix it in time. I should have assigned harvest to a different key, as you suggested you're right.
As for the music, I love creating it, but I'm a complete amateur. Every jam starts with a blank canvas for me. Autumn means for me nostalgia but the slow rhythm and long reverb do not fit with the fast-paced of the game after consideration. (But my guitar skills are too limited to play faster!)