Oh, I'm not definitely saying I won't do more, but I don't want to create expectations given my spotty track record *and* how fickle this game can be in certain aspects. For example, the game's actual resolution of 400 x 240 pixels is not always respected (some sprites on the map tended to be slightly distorted) and I have no idea if that might happen later in the game.
Some stages would definitely be easier like those you mentioned or the Hall of Champions where scrolling is not a problem. Others might be much harder depending on the ease of separating the background layers. All I'm saying is, let's wait and see.