This is really cool game and I like the tongue mechanic, you used it in many creative ways.
The first stage was super fun. But after I finished it I got a little bit overwhelmed. There were so many new mechanics and elements I needed to learn and the game design was really open, neither of those bad things, but all of this made me feel not sure about what I was supposed to do or learn first.
This is looking like a really promising game so have good luck!