My question is specifically based on this puzzle of mine which was closed a few months back on the main site. Now, I failed to understand why it was closed and didn't get a satisfactory answer at that time too.
Now, closing puzzles which aren't good enough is fine with me. But, I sincerely believe that the OP should be informed of where he needs to improve on his puzzle so that in the future, he doesn't face the same problems again. The users who voted to close the puzzle could suggest ways on how to improve the puzzle rather than a simple "I voted to close this puzzle as off-topic.. bla bla bla" which does no favours to anyone.
I also tried to ask for an answer at the Sphinx Lair,which is one of the most active chatrooms at PSE, but I received no answers, (probably because it was weekends).
My question is, Why was this question closed? I would appreciate an answer which could suggest how to improve on similar puzzles, were I to post them in the future.
P.S. This was the intended solution