Really cool. Though, if it were me making this, I would add some texture to the piece before I'd consider it finished. Looking at the original piece, it looks like it might be a wall painting with it's rich textures and slight imperfections. Your piece looks every bit a computer generated image by comparison (read, too perfect). I'm not sure whether your teacher cares about it looking that way or if you're limited by what tools you may use in making your piece, but I'd like to add something more to it to make it pop.
Which is what I did. Check your PM inbox to see the quick little edit I made to your piece to show you what I mean.
Great work, regardless. Looks terrific!