Very pleasant
Gameplay is simple and not terribly original in itself. What makes up for it is the artistic style. The music, b&w drawing with splashes of color, and the storyline that all work together to make a beautiful experience. I'm glad you didn't try to make the game longer, because it might have become monotonous.
I liked the splashes of color, but was dissapointed that they were not integral to the game, it didn't seem to matter either way. Perhaps vines might have grown which could then be climbed to reach a ledge. I have some other ideas that I'd be happy to share with you if you perhaps intend to create a sequel.
Overall, a nice game that is peaceful and enjoyable.