@Link When I pressed B against the grass wall, B was either pushed out the side over over the top. If there were a wall on the side to hold B in during the press, then my B could have gotten up versus getting tossed over the grass.
@Link Sorry to interrupt. @Meko Guy Spoiler Slide 'I' shaped slider to redirect zR for Star near Zapper. B takes top Star then in-air Star. No squeeze, no wall needed.
@Pratik Bhalerao - Funny - I had the wrong game play for B. This level was easier than I was doing it.
@Meko Guy Spoiler B had to get the star on top but zR needed to get the others, including the last star, the drop. Probably you thought that B had to drop to get the star below him.