Please critique my work.

[Torai]

I made this from scratch using Paint and GIMP. It's not being made for a game. I just did it because I had some free time. Please give constructive criticism.

 

[MCsephiroth13]

The ring on the planet is way too big. I like how all the colors blend though.

 

[Admiral David]

looks prty cool, only thing I would do is , well nvrmind im seein stars now lol but adding something to the green would be nice, how do you create that water color looking effect, with the moon and comet, its sweet

 

[Jason]

Hmm I think the background could do with being darker, and lol at MC, that, to me (And dsoulja85) looks like a comet flying by the moon, pretty cool if I might say so.