Same here, dig those NPA effects. Almost reminds me of looking back on a nostalgic memory.
However, I'd like to see a bit of hue-shifting on the trees if possible (more of a teal-green?), and the purple trees don't fit very well into the color scheme. If you have to settle for a peculiar color for that tree, grey, brown, yellow or a generally warm color would look better. The trunks are a bit saturated as well, especially in the second screen, and I'm with Olonthor here--the classes may have to be distinguished more.