B doesn't need to walk over a zapper but I dropped 2 stars for 2 unstable moves. When B is on P and P steps from a zapper to a draggable, B falls off of P more often than not hanging on. The move is required twice and one may work but the next not and each time one needs to restart which becomes very annoying really fast. Correct me if I'm wrong.... Aside from that good level.
Really cool level with plenty of good ideas but perhaps you added too much unnecessary tricks that only added complexity and instabilities to the level, breaking some how the final experience. But it was very fun in general. Thanks for sharing!