Fun puzzles! Some of them took me a lot of attempts to get, in particular 3, 5, and 9 since for some reason my brain couldn't get around the idea of not eating the apples. Somehow I missed the hint text the first time I played level 3 (facepalm). It's amusing when you get into a loop where you are so close to connecting it but end up chasing your tail around in circles in desperation. The audio and shader effect are great, and the snake is cute. Excellent work!