Quite a polished game in game jam standard.
The dragon's telegraph is good enough, the fight is generally fair.
I particularly like the fireball rain which tracks your future position.
In later stages i would like the the fireballs to fall faster on top of the already quicker successions.
The dragon has a good variety of moves, the player does not. The player's skills tied to carrots was an interesting idea i wish we can discuss further, but all i see if to spawn more carrots for... May be healing? The carrot missiles overlap with the throwing sword, which is much more interesting than the carrot.
Throwing sword almost has the LoL Draven vibe, where you throw an axe with less risks, but you have to react to the axe's next position and catch it. I would hope the throwing sword's landing position would be random but telegraphed. It would be so fun doing that.
The scales falling on the ground: Good job animating the final collecting sequence. At first i thought i had to pick up the scales and spend them to cast spells or something. But it is nice this way as well.