gradient nails

I've been meaning to try this on my nails for the LONGEST time and I finally got some free time last night. I didn't have the best sponge so it came out a little uneven, but not so bad for my first time (:

The contrast between the colors is bolder in person, and there's more sparkles but the flash kinda killed them in the pictures.  How did I do? I'd love feedback/tips/more suggestions for nail art?