Just some things I'm noticing. Skin's great, I'm just picky.
- If you ever have an alpha channel fading to completely transparent (there's a lot) make sure you leave at least a 1 pixel wide line of complete transparency along the edge. The way most image editors resize/displaying stuff on an edge gives the illusion of a straight edge, when it shouldn't be. Virtually every image has this right now.
- spinner-background.png needs to have the gradient dithered. You might as well make it 1024x692 as well, as that's the real width of the screen (the template isn't really 100% correct). The gray line on the top looks bad and should just be black.
- spinner-circle.png is still not centered. Make the actual spinner 664x664 and leave a 1 pixel wide box around it to make it 666x666. The left and bottom edges have a 6 pixel black area, but the top and right edges have a 7 pixel black area.
- spinner-clear.png - completely optional, but it's not imperative that all the images be the same dimension as the template skin. If they are smaller, that's fine. If they are bigger, it might be a problem. This particular one has a lot of transparent space which has to be displayed. Cropping it out cuts down on the size and the processing time.
- sliderpoint10 and sliderpoint30 - make the black pixels gray. They are very jagged when black.
- star2.png and any other invisible items - you may as well make them 1 pixel and transparent. If you want a 68 byte invisible png, take it out of my blythe map, or compress it yourself.
- score-x.png - you need the score period, comma, x, and percent for score items. It's not necessary for default unless you are going to use the default as your score numbers.
- ranking-x.png - all of the SS ones are lighter than their counterparts, and thus hard to see, not that it's necessary to know you have an SS when you can see you have 100% accuracy.
- playfield.png - not that anyone ever sees this, but it is colorized based on the map background color, so it's supposed to be grayscale. However, the different colors make more distinct shades of blue/green/red or whatever the colors are so maybe it's fine the way it is.
menu-button-background.png - shouldn't this be a circle, not an oval? - spinnerspin.png - Shouldn't this be flipped? AFAIK most people spin counter-clockwise, and the spinner circle looks like it was meant to spin counter clockwise. You can also crop out the left and right portions as they are not used.