The player jumps to short, and instead clips into the line, and is still able to move. This is what basiccaly makes the zipline part come into play. WASD movement Wall jumping.
If you clip into a wall, hold a and w until you are out. CREDITS @NARUTO9909 one of my friends who made the engine :EMPTY: Anybody who helps me in the comments with fixing the wall clip, while maintaining the wall jumping.