Crazy Cable app for iPhone and iPad

Long ago, the citizens of the Italian Alpine village of Ugot decided to build a cable car to the top of nearby Pear Hill. Like all Alpine engineers, they liked to dig tunnels, so they built their cable car straight through the middle of the hill. However, the glaciers on top have begun to melt, and the resulting water dripping through the ground has created huge stalactites and stalagmites inside their tunnel, obstructing the path of the cable car. The cable cars owners have decided that the cost of clearing the obstacles would cut their profits too severely, so they have instead decided to hire an operator who can avoid hitting them. That operator is you. Good luck!