Amazing idea! I instantly loved the concept of moving around with tongue grappling.
I promise I pushed every button many times, but I still somehow didn't manage to intuitively learn that I could flip upside down until reading the comments here.
The snakes are a tough challenge in the final level, but not insurmountable. I liked the title music, it would have been nice to have some for the levels themselves. The sound effect of the tongue is perfect, as is the musical sting of becoming snake food.