This is going to be a slow learning process.
Okay.
Starting from the top left, the underwater palette. It doesn't need to be be so totally different that details and shading get obscured. It seems you're aiming for a blue adjustment, so adjust it so it tries to conform to both being blue, and adheres to the palette that is used in general. Sort of like transparent blue over the character, but not really as you want to emulate the technical limitations of the Genesis.
The background is pretty much the same as before, just with some stars and a cutdown section of an aurora. Here's a Google Image Search of the Aurora Borealis, and another of the Aurora Australis. Also, try to flow the palettes into each other, it won't just shift between entirely different color schemes. I recommend using a non-standard color as a template for some stars and having a glowing palette for them.
The freezer thing on Robotnik's unit simultaneously looks better and worse than before. When I said about adding detail, I meant about it being attached to the unit, not a spurious hole that looks like something rammed it's way out the inside of the weapon - the dark shading on the top of the weapon doesn't need to be so dark as well. Also, the base of the unit, the lighting/light source wouldn't really touch it, so I'm not sure what the blue is about.
Elsehow, my criticism in my previous comment still stands. And you still need to credit Tom Payne, I never said anything about removing the tag outright, just change it.
Aside: It might seem like I'm giving you grief, I'm just trying to help you get on the ball with it.
Okay.
Starting from the top left, the underwater palette. It doesn't need to be be so totally different that details and shading get obscured. It seems you're aiming for a blue adjustment, so adjust it so it tries to conform to both being blue, and adheres to the palette that is used in general. Sort of like transparent blue over the character, but not really as you want to emulate the technical limitations of the Genesis.
The background is pretty much the same as before, just with some stars and a cutdown section of an aurora. Here's a Google Image Search of the Aurora Borealis, and another of the Aurora Australis. Also, try to flow the palettes into each other, it won't just shift between entirely different color schemes. I recommend using a non-standard color as a template for some stars and having a glowing palette for them.
The freezer thing on Robotnik's unit simultaneously looks better and worse than before. When I said about adding detail, I meant about it being attached to the unit, not a spurious hole that looks like something rammed it's way out the inside of the weapon - the dark shading on the top of the weapon doesn't need to be so dark as well. Also, the base of the unit, the lighting/light source wouldn't really touch it, so I'm not sure what the blue is about.
Elsehow, my criticism in my previous comment still stands. And you still need to credit Tom Payne, I never said anything about removing the tag outright, just change it.
Aside: It might seem like I'm giving you grief, I'm just trying to help you get on the ball with it.