As others have said, great job. You've more patience than I can muster at this point. My attempt would have most likely ended up as random bits and pieces stuffed into another 'I'll get to it later' bag. I really enjoy the 3D effect of the petals. I'll also echo the 'yay! recycling' sentiment.
With something like that, do you typically build the flowers and "objects" separately and then sew finished pieces on, or do you sew each petal, stem, etc onto the "background"? I've tried doing piecework stuff like this in the past but always lose interest or get frustrated with things not lining up. Maybe it's my approach - I've tried both ways.