From Fantastic Wiki
The goal is the area that all goal objects must reach to achieve victory. When a level has multiple goal objects, all must be in the goal at the same time to win.
Note that the borders of a goal area do not count for victory conditions. This small detail makes quite a few user-designed levels impossible to defeat, and stresses the importance of testing your levels for possible victory before publishing them. Scroll over these goals to see analysis of the goal design. The first is solvable, but the other is impossible.