In Candy Ninja, your goal is to slice through as many pieces of candy as possible before time runs out. Another option is to fill up the thermometer with successful slices. Be careful not to slice the bombs when they show up, because they'll take away points or reduce your time.
Candy Ninja Instructions
To play, just swipe your screen or click and hold your mouse to slice through the candies. Note that some candy is harder than others, so you may need to slice them a few extra times to get them to crack.