I don't know what you meant by think out of the box. Once you find the hidden FD it is a piece of cake.
@Pratik Bhalerao I won through your intended game play, that is drawing FD out of water and getting B over it and then on the steps. I also won by using the top FD.
After playing your last level, I happened to check out your levels page and, to my surprise, saw a few I hadn't played, so I downloaded them. Your (I think) sixth level demonstrates the incredible improvement you've made. Well, strictly speaking about the level, it's clear that its playability is influenced by the presence of FDs. If I had played it at the time of publication, I would have given it a 4-star rating, probably due to the decontextualized use of FDs. Thanks @Pratik Bhalerao it's a pleasure to see your progression and be able to play your levels.