fun little game! I included it in my Loading Screen Jam compilation video series, if you'd like to take a look :) https://www.youtube.com/watch?v=Czk_NWJ0K5A&feature=youtu.be

Nice work. What about wrapping around if you go over the screen edge. And maybe a powerup that will reduce the length of the snake.

Cool idea, I feel like the game suffers from not being aligned to a grid though; the collision(loss)-detection feels bad and "off"