Ahh, well pixel art is easy. You just go to photoshop and draw with a pencil tool (which draws 1 pixel at a time). You can even use the Paint program!
Animated GIFs are more complicated. You need Adobe ImageReady for that. And i bet there are on-line tutorials on how to animate with that program (cos i don't know how... something to do with layers...).
Congrats!!! I've featured this creation in the April Visual Art Features. Check it here : [link] This feature is also in the news so more views for you : [link]. Please check it to view other's art and fave the news article if you like it!