This is super cool, it mimics the Pokemon 2D style very well! Great colors, clean line art, everything~ I agree with ADM, a version with the scenes more "melding" together would be great, though.
My only real complaint is the bush in the bottom left looks a little rushed and could use some polishing. Maybe add more shadow towards the bottom to communicate a better sense of depth? Maybe even add a little bit of highlights, like the tree has? c:
Well done! I do wish that the three scenes molded into each other instead of being seperated by a white lines but perhaps that would require a bigger canvas. Great piece nevertheless!
I like the colors did you use but, mainly, the composition. Great work!