A scientist, after the death of a loved one, strives to create the perfect lactobacillus in order to prolong life, and with that you play as the surviving lactobacillus who's trying his best to survive the hazards of the human body by jumping over obstacles, enemies, spikes and bottomless pits! With the coins you get in your runs, you can upgrade or even evolve your lactobacillus to survive longer and you can get bonus prizes by using pills in capsules!