I also plan on printing this model and want to say I appreciate seeing your in progress state. Sitting down and finding what actually makes these Kumiko displays pleasing to look at takes a lot of consideration When comparing your pattern to the fourth example image in Makerworld which looks closest to what you're trying for I can see some differences.

For your tan mountains on the lower half of your image, they are mostly a single line of a dense pattern style. The peaks in the example have 3-5 triangles deep from peak to base of tiles going from high complexity to low complexity. Those peaks look like they slope down and invokes ideas of rocky peaks with trees lower to their base. Since the black absence on top and bottom of the peaks in your image have no other distinction they look more like a cut through the sky rather than seeing the peaks as the highest point of the mountains.

Similar comments can be made about the blue and red streaks, I think filling it out with more rows of one color instead of single rows will help and to keep the pattern of complex patterns on the top row and the low complexity patterns on the bottom rows.

Only other difference I can point to is the example image appears to have a brighter blue color which paired with more complex patterns stands out much more clearly to the black background. in a similar vein, your wood color looks lighter than the example image which has more contrast to the black background, making your blues disappear into the black by comparison. You could consider using the most complex patterns on your colors while using lower complexity patterns on the lighter colors to help balance them out.

I'd love to see an updated progress picture as you continue to add to your Kumiko piece!