@ZoSo and Aritriste: Yes, it is indeed RPGMaker, although the 2000 version. And as progFX already quoted my saying, I only did the char and clouds, and the tile set is a mix from default graphics and some taken from the net. And as I said at the beginning, I started making this game only for fun, and it was back in 2001 or so, and I didn't care wether the graphics were mine or not, crappy or not. It was just fun, and still is, only now I'm more interested in learning pixel art. Oh, and thanks a lot for the compliment, Aristriste.
@Stwelin: I only posted the screenshot of the game to show how the clouds were being used, nothing more. It would be a little hard to tell only by the cloud sprites. As for the clouds, I'm already using 4 shades, although it may not look like so, maybe I need to use the darker shades a bit more. And I'll try some different hues, I liked the ideia. Thanks for the feedback!