You were the one that made the maps, right?
(Thank god... if someone else made them for you, I would be disappointed.)
Anyway, Route 1 is, well, a huge rectangle. The grass is really oddly placed; try clumps and not just use the rectangle tool to make a blob of grass. The flowers are cluttering in one area, making it seem as if you made a section just for them (theres nothing else on that platform). The trees are uniform and bland, forcing the player to move in a straight line. The pond of water seems completely out of place. It looks marsh-like and completely different than your other tiles. Try a less rectangular, lighter pond. Is there a reason that there are mountain tiles? It's fine, but it would seem out of place compared to the town.
Now, onto the town. The town's shape is slightly better, but just as bland. The trees make out a perfect outline of the town. Is the random 1-tile wide "path" on the right really necessary? The road looks squished and linear; use the different layers on RMXP. The trees look like they were put on layer one, which leaves white dots around them. In the top right corner, there are trees with flat sides, you might want to fix that. There is also a tiling error on the bottom green house. Once again, I find the mountain ledge out of place. The flowers are also clumped together again. When you import your tilesets, you should make the shadow color the semi transparent color, it makes the shadow look much better. Also, just our of curiosity, why is the town named Bigcorn?
When you map, you should be able to barely fit everything in there, not trying to fill up empty space.
@Ratty524 (Below):
I completely agree with you. Your post made me remember one thing - the first route should have ledges to easily go back to the starting town, but like you said, any path leading back is fine.