I absolutely love the Chameleon mechanic, very cool idea! :D This is a brilliant example of how a strong core mechanic can create a wide variety of fun gameplay opportunities. The snakes genuinely caught me off guard when they grabbed me as I walked past :D haha.
I also really like the graphic style and the smooth controls. One small touch that could add even more atmosphere would be some subtle background music layered over the ambient sound effects you already have.
Overall though, I absolutely love this game. I reached the end and was genuinely disappointed when the fun stopped, lol :p
Excellent work with this game though. I can imagine so many possibilities for expanding this concept, like differently themed levels, more challenging obstacles (for example moving platforms where you have to carefully time your tongue shots), different types of enemies, and player abilities such as speed boosts or shields etc.