I recommend regularly checking how your works looks in greyscale*. Even crap monitors usually at least get the values decent (and if not, you can probably calibrate it to look at least passable through your OS). Checking the values is useful even on a good monitor, as it makes it easier to spot problem areas.
Try to avoid using colours at 100% saturation except for bright highlights and accent colours, colours that are used very sparingly to draw attention to the most important parts of the image. When everything stands out, nothing stands out. Using high saturation everywhere is like using bold text for the entirety of a post - it gets hard to spot any emphasised parts, and is just generally hard to look at.
The saturation of a colour is a number you can check, so you can spot potentially bad saturation even on a rubbish monitor, it just takes a little more conscious work.
Here's an edit, along with the values* of both. My edit is definitely duller than yours, but I think it's more pleasing to spend any time looking at, and the details read more clearly. The colours in my edit are actually still quite saturated, and only look dull in comparison to yours xP
In addition to adjusting the blues, I also made your two yellows a little more orange. Orange is the opposite of blue, so it helps the blue look more blue.
* I use a greyscale conversion that approximates the way human eyes perceive colours. This is not the same as just taking the brightness level of each pixel, since humans perceive yellows and greens as lighter than reds and blues. The way to achieve this differs from program to program, not all grayscale conversion methods account for humans being weird.
I blame all my low quality monitors! I REALLY need a neew monitor (the only sanity test i have is my laptop wich isnt better)
Thatnks for pointing out...i will make a little more complex palettes in the next pieces and sanity test them in school.
Please point things like that out because i am kinda immune to colors.
Personally I like it. There is a lower quality about your recent pieces. I don't know of any other reference, mostly because of my inexperience with these things, than to put it in video game terms. Your gold series is like a Sega Genesis and these recent submissions are more NES. I have appreciation for both though, so it's alright in my book. 
. Plus you literally used the term "doodley do", so for what it is, i think it's pretty great. 
I think the bright blues in your recent submissions have been unpleasant. Such high-saturation colours can be literally painful to look at. In addition, the cyan and white contrast very little, so the work you put into using both for highlights isn't very visible. A slightly darker cyan would help, I think.
Very very helpful...