Thanks, D-jinn. I'm aware of AA, and to smooth out a piece is a design choice. Sometimes I just prefer to see the pixels in all their squared-off goodness. Adding AA to this, in my opinion, would make it look like vector art. I just felt more NES than Super NES at the time of creation. 

Looks nice, but I can feel so more inside this piece... I'm talking about AA (yep).
I think if you put some AA on those clouds (and the bird, you can't left out the bird)
it will look too much better, so you placed that pinky background, and it will make more
sence if you add to the foreground a bit of AA.

Here's a theme where you can find some about AA.