after more than 3 months (on and off) working on this - it's finally finished. the style is pretty incoherent, since it sort of developed with time, and some parts - especially the plants, are really rushed, because the file was huge and Illustrator wasn't cooperating anymore.
i'm not quite sure if i like it. it was a real challenge for me to work with so many colours, so i'm not sure if i did o.k.

[edit] it would take me a lot of time (which i currently don't have) to personally thank each one who added this to their favourites or left a heartwarming comment, so - thank you all, i appreciate it. i really didn't expect so many people to like it.