I really liked the art style and the choice for the main character (though horny toad can seem like an unfortunate title 😄)!
It would have been nice to have some sort of direction or additional challenges, as in my play I was mostly wondering around aimlessly looking for water or plants. Speaking of which, I really like the design choice to add beneficial flowers next to the dangerous cacti! It rewards the player's maneuvers, which goes well with the responsive controls and collision.
Great job!