Hello. I've seen you had some troubles with mapping your route. Try to make it look a bit like that
https://dl.dropbox.com/u/64451898/Fix.png The green colors are meant to be trees so fill them with. Don't overuse flowers like you did here. Flowers grows in patches but max of 4 or 3. Also same goes for grass. You overused it a bit. Remove some grass and It will be alright. I hope that will help you.