Its very creative! I like the idea and I appreciate the very literal interpretation of the game's theme. It is a bit confusing on how to play the game though. It seemed a bit buggy in some instances when it came to moving the shapes into the test tubes. I agree with Letholor that the text does disappear a bit too quickly to read and be helpful. I would also suggest having some sort of compendium in the game that at least lists out known "recipes" Although I could see where that could harm the challenge of the game. Overall well done though!
Oh, and big bonus points for having a Linux version. I always appreciate that :)