Nice game!
I liked how the controls were simple and the more you consume, the less time you have to decide if you consume or spit!
About the mouth opening after consuming, i think that maybe it's abit unfair for the next item's visibility be affected by the animation. (like, you can only see abit of it and have to wait for the mouth to fully open again) This could be troublesome in moments where you have 200 or 300 scores (like, very small time to react)
Overall, good game!