Incredibly well made game.
The only two points of criticism I have are that it wasn't immediately obvious that the frogs would destroy the wheat (maybe mud could appear in wheat tiles when a frog tile is connected to it?), and that frogs didn't seem to drop anything in the first quest that required them to (though I may just be missing something).
Otherwise this was essentially flawless. It felt really fun to play, the mechanics were intuitive, the puzzle design was great, visuals and audio were really nice, and the theme use was fantastic.
(also another game with a lighthouse!)