Alright, here is some advice...
Well first, your path should lead from one place to another. If you want to get nuts and add jiggy-wiggy stuff, use some dirt.
You have alot of
green and you should try using some other tiles. Try using some puddles, they look nice done properly and add some spizaz.
I boxed your trees on the level (top-left corner) because they look, well, too straight;almost in line, but they aren't. Hehe.
Try spreading them out, but not too many. Make them go off the level or add another group of trees around the middle of the level.
Also, your house is wack. The roof needs to be fixed. I'm sure you can figure out a way to fix it on your own?
Aside from that, your swamp had some errors and is just not right. It looks bad. You also had alot of "half-grass" tile errors. The old tileset had the grass so they could be used alone or with the other half. They looked normal -- now they don't.
Anyway, I'll give you a 3!/10 for effort.