Soneso put out a quick update to ContraSense after the release of the previous version 1.5. The update does not make any visual changes to the app but, it does fixes a few bugs dealing with the ability to pass a level (there were too many cars in a row for your car to fit through) and the level speeds changed.
ContraSense is available in the Installer.app through the Soneso source. Below is the screenshot: