Sorry - I'll not rate as I didn't finish the level. It was't fun to play for me as that vibrating machine got on my nerves (too noisy).
This level is extremely unstable. That rattling platform randomly makes the ball slider go haywire without warning, and once the tall hat R bots start swaying, B can't stay aboard. Spoiler I assume the strategy is to use the ball so B can walk the outer path to avoid upsetting the tall hat Rs.