Do game designers re-visit their games?

I'm curious, because I replayed a favorite game from a few years back (reloaded from my Purchase History on BF), and I could swear one of the puzzles had been changed. It was a "tangram" sort of puzzle and I remember it as being pretty pesky. I had to sit down and draw the pieces, cut them out and manipulate them for quite a while to achieve the solution. This time, though, when I played the game, there were little clues on the puzzle itself as to the final arrangement of the pieces and I finished the puzzle in about a minute. Hence, the question.

I think the only "revisiting" occurs when a game gets a patch. Maybe what you saw was part of an update?

Is an "update" not something done by the original game designers? Who does updates?

The publisher contacts the developers to address things that are brought up in tech support or some things are sent to them directly via their facebook pages. If many people are complaining about the difficulty of a puzzle or a bug, it is the developer's choice to fix. Not all follow through, hence some games never get fixed. They can also change the difficulty or add help. So, in other words, Big Fish is not the one changing the code, the developer of the game does that.

It makes sense, thanks. The Lost Lands series is one of the all-time best in this genre, and if the developers care about that legacy, they'd want to fix something.