The trick on level 14 is to act fast when the level starts and prevent the black balls to fall inside the "U" shape. To do so you have to make a oblique line fast below the falling balls. If you doing it right the line should also slide off, clearing the path. Now just connect the red ball platform with the "U" shape using a simple line. The video below will show you how to do it!
Physics Drop Level 14 Walkthrough, Solution, Cheats for Android, iPhone, iPad, iPod. Note: This is "Physics Drop" by "IDC Games"