I made a red castle palette to demonstrate a good... red castle palette:

Yonowaaru: yeah, Aqualakitu is right, it isn't very good, no offense.
There are a few major problems with your palette:
1. TOO MUCH SATURATION(biggest problem)! You seem to have selected your colors from the top of the color-picking-box. Big mistake. Colors chosen from around the vertical-middle are generally much better looking, and a lot easier on the eyes.
2. Not enough variation. It seems the gradient that makes up your palette is one color made lighter on one end and darker on the other. Palettes generally looks better when each side of the gradient is relatively different. Notice how in my palette one side of the palette is sort of a darkish pale red, while the other side is a pale yellow-orange. These variations look good, usually, and have better results.
3. Unchanged white. Notice the top of castle walls/floors/ceilings(not the castle blocks) have white tops. You should edit the white, it contrasts way too much with the rest of the castle wall. I usually place the most-left color of the gradient on the Color
8 space, not 7(it's the 9th square on horizontal rows counting the transparency color). It doesn't show up in the palette, but I copy that color after creating the gradient, and paste it over the white color of my palette. That looks good, usually.
So, yeah, read that, and you should be good to go(and remember, practice makes perfect).
Your layout has been removed.