Simple and effective. Very well done.

The purply-blue shadow really sells it for me... adds a lot of depth. Nicely done!

 Dang, I want it in my game.. 

Wow! the use of warm and cool colors in this really draw the eye. Excellent work!

Lighting is great, and there's a really solid sense of volume. Great stuff!

 Ah, when we still used floppy disks. Awsome pixel too.

Like Dr D said, perfect

 Ooh, very nice and very retro!

Perfect.

I LIKE PURPLE TOO.  

Also I like well pixelled spinning floppy disk icons.  And this is one!