This sounds like Bowser's Castle. There is a beta at Newgrounds (very incomplete), with some discussion and comment by the person who claims to be the author:http://www.newgrounds.com/portal/view/490037
A more developed version is here:http://wetpussygames.com/adult-games/bowsers-castle.html
That one isn't finished, either, but you can collect more items and you interact with Donkey-Kong and Koopa-Troopa to enter other areas. One room is a dead-end with no exit.
There are some scenes I see with Swiff-Player that you can't get to, and there doesn't seem to be a use for all of the items.
The (alleged) author says he's not going to finish it. Too bad because it could be a fun little game. There is comment that someone else is working on the game and the (alleged) author is upset about that. The second link above might be to one of those.