... i wont rate this level, it contain free object which can reach win block without B must do anything. you must delete this level, fix it first then reupload. just my suggestion.
I won with a free draggable (FD) and didn't need B at all. You should always anchor draggables with a slider so they are not free to go anywhere....
I was just curious if you have finished all of the 50 preloaded levels by the creator magni? You can get hints there to create a more stable level.