I gave it a go and those three auto sliders - B missed over and over so I gave up on that part. The sliders were too slow for any more attempts. Looking ahead, the rest was an interesting route but doable.
I gave it another go and won but I did use one trick as the auto sliders evaded me for another 10 attempts. I used an auto pilot move - I placed the vertical lift and horizontal slider (HS) together and when the last auto slider was under the HS, I tapped the HS, moved it towards the end and B fell on the auto slider - B got up the stairs and completed. One thing to remember is your first move with the motor was unstable as the motor would hit the grass block - motors shouldn't hit anything. BTW, it's your level but I didn't think the outside game play matched the inside play. The inside route was obscure and fun. Thanks
Very enjoyable little puzzle. I did not have to use any tricks and stepping from one moving slider to the next was not excessively difficult. Anyway, I solved the puzzle without any restarts.