What a game.
What an astounding game! A unique concept and creative programming make this game a joy to play. The different puke mechanics were all add interesting twists, and the levels were all a blast to play.
My only criticism: the framerate simply gets too low. It's hard to appreciate the spewing when the game starts to run at a snail's pace. I'm not sure if the physics are the bottleneck, or if it's the metaballs, but spending some time trying to oil it up could go a long way. Maybe you could lower the quality of the metaballs. If the rendering is the bottleneck, you could even try decoupling the game logic from the framerate and ticking multiple game updates in one frame if necessary. You could also try downloading Flex Builder and running the game through the profiler -- it could be insightful!
Overall, just a fantastic game, and I wouldn't be surprised to see it picked up as an downloadable title on consoles!