This is brilliant. I would never have thought to make snake into a puzzle game, but it works so well. Short and sweet. I also think the sound design works super well.
My only suggestion is that I wish the graphics were a little better, but for a game jam game it's totally expected. I love the style of the title/end screen art, wish the game itself looked like that.
I would love to see a longer version of this! I think you took some great simple mechanics and made them work well together.