Muaah it looks like a faace!

Stars are not pixie dust, try to make it a bit more uneven in size, some should be big, some should be small.

Also the 'comet's look like they were just duplicated, if they are heading in the same direction then it would be fine, but since they aren't the lighting is very uneven. Look at the comet to the right, it should've been at least rotated a bit to the left :P