I like the base mechanics idea a lot, and the characters are cute with a lovely art style! I really liked the painted style of the characters and their designs are very cute.
The funny thing is spinning is not the best way to cut the fields, it's best to just slide back and forth like a loom haha; I'd like if he spun on his own when clicking (or pressing enter like another reply says, but I did it by clicking), then one could have fun zipping around the fields.
I think for the sheer amount of fields, maybe there should be a timer and it's more "get as much wheat as you can in the time limit" sort of game? Or for a slice of the game, adding less fields so players can get to the ending in the time frame would help show everything off.