I´m now in this level Im trying overcome puzzles-time.
Activate a Black One-Time Switch (BOTS) as soon as you can, every time you see one. When you come to the Rolling 8Ball (R8B) area, watch for the larger space between them, to make it easier to follow them around to the entrance to the central Arrowz puzzle. After you free the Grunt stuck in there, and remove the enemy Grunt , both Gruntz exit down a stairway to follow the R8Bz back to where the Grunt entered.
Also, do not be too hasty to dispose of the enemy Gruntz you encounter later ... get them to 'help you' remove obstaclez , first.