unnecessarily complex yet rather cool solution to lvl4:
b,3,10;b,9,10;m,4,13,0,2,wllcrorw;m,3,13,0,2,wwucldor;m,10,13,0,2,wwwwlorc;m,9,6,0,2,rcllouwr;m,4,2,0,2,wwwwucdo;m,6,10,0,2,llcrroww;
Jeff, the ball will NEVER stop rolling until it gets jammed somewhere. That's why you normally have to get the ball stuck between a circular block and another block or wall.