The game looks really good, although I think it'd be improved if the sphere was a bit smaller. It feels like it takes too long for the game to become difficult
Here's a console command you can run to increase the snake length immediately, and thus the difficulty:
(() => { let count = 50; const delay = 100; const interval = setInterval(() => { addSnakeNode(); if (--count <= 0) clearInterval(interval); }, delay);})()
Speed should slightly increase with each new apple
Agree - my millennial brain got bored quickly and it was still very easy.
Here's a console command you can run to increase the snake length immediately, and thus the difficulty: