@Don G Rowe - I think the creator intended the player to cross only by using the lower level of sliders, hence no exploits required/desired.
A rather simplistic ability level that those looking for less of a challenge may enjoy more. The reason that others might find that you can cheat on this level is due to B's path planning algorithm that we call Autopilot. If one taps only the grass blocks then B will happily jump down and/or climb back up from the water. In fact B can overcome any one block height obstacles this way. In order to avoid players cheating using such an exploit you'd have to build the walls two blocks high. Nice idea for a level though that I'm going to tag 4kids. Thanks for sharing!
Excellent ability/timing level!! At first,I thought,like @Don G Rowe that this wasn't doable without tricks but I was wrong!! Great original level!! Thanks for sharing and excellent job @maheé
@nGord 4 kids?? I'm not sure that this would be 4 kids...if @Don G Rowe thought that tricks were needed and he is a great creator/player ,I think that this is a VERY DIFFICULT CHALLENGE 4 KIDS...even if you do it without tricks, the intentional solution, in my humble opinion, is not 4 kids
@delator77 My B just kept ending up on the top sliders via autopilot, so I figured that was the idea. It takes a serious effort to not use autopilot on this level.