Nice first attempt, keep it up man. I first saw this kind of spraycan art in Mexico where an artist at my resort was doing them. It looked like he had moved on from spacescapes some time long ago, but he did have a few AWESOME ones. Here's a picture of one of the paintings I bought. It took him about 7 minutes to spray. I think it's an amazing technique, and it, along with banksy, inspired me to get back into spraycan art for things other than graffiti.