Really cool take on snake !
The visuals are lovely the music fit well & the gameplay is simple yet engaging & challenging.
Only little pointer is the chicks noises get a bit repetitive & annoying. maybe reduce the pitch & implement some variations so it's less repetitive.
Didn't manage to play the hard level. On a released game It's a very good design choice to lock levels until you're good enough to access them. For a game jam though, it might be a good idea to allow players to access them anyway (you want people to see everything you made for the jam ;) ).
Appart from that it's a very solid & lovely entry. Great job there :)