At first I thought this game was frustrating and very trial and error. But then I played more. I started learning the map and understanding where each heart was and how far I was from reaching it. And the process went from randomly randomly pressing buttons to exploring to find the best route to a certain point. It's a really interesting concept - a sort metroidvania snake game - I could easily see this extended into a larger game with powerup or walls you need to be a certain colour snake to eat through.
Nice work.