the star background is great but the lines on the cubes are a bit jagged and need smoothed out

Awesome

That's a real neat starfield 

This is really neat. I'm usually against dither, but it would probably look good in the bg. Also, those lines on the cube should either be at a perfect angle or AAed. Looks kinda sloppy, especially at 2x

Nice.

maybe the brightest color seems to be more brighty. good work on it.

I like it. I would love to se even more detail on the cube's reflections, but it's great.