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Because we're stuck. It's a soothing stuck, because the music is very nice, but we just can't beat it. In Light Up 2, your goal is to click the white bubbles until the yellow bubble hits the dark bubble. Here's the catch(es), though -- you only get a certain number of clicks, and the gray bubbles won't move, period. So, we're up to level four. Try it yourself, and tell us how much smarter you are (and how to pass that darned level four please) in the comments.