This is probably one of the funnest games in the jam. That being said, there are many things that can be improved.
I think it would be really useful if there was some sort of retical. It's easy for the cursor to get lost in the chaos.
The dialogue gets really repetitive really quickly. It could use either more variety or less frequency.
Missed opportunity to have multiple kinds of animals on your back.
The boss's music just cuts out after a while??? Make sure the music loops there. I was left in silence for a long time.
MIXELS WHYYYY!!! You need a more cohesive art style, my friend.
Overall, this is probably a 9/10 for a game jam game. I'm just better at criticism than compliments :P