Input Smoothing?(Helped)

Ronan - Custom level - Apr 18, 2014 from Android
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I am now trying to devise a way to throttle back input so that I can keep the higher voltage/torque. This seems to be slightly beyond my skill level though. I think what I would need is something that follows a sine wave on input. This stage demonstrates the problem. The boxes should remain on the platform when the slider is manipulated; even if jerked up and down.

Downloads: 48 - Level ID: 5171

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