Jade said the same thing about small thumbnails when I started posting Images. I don't regret making an imgur account and ditching the small thumbnails forever. You should make an account too. It'll keep the quality in tact.
Your design is beautiful. I see a butterfly when I look at it as a whole. Than my focus changes to the red hearts. Until I look at the aqua back ground and see an atom. Its fun to see what I can find in it and it makes you think. Kind of wish I came up with an amazing smooth and colorful design like that.