just awesome!  

Great colors and shading

Nice style, you mix up dark and light colors good.
It feels like the houses are missing something tho, but I can't put my finger on what actually..
And I'm agreeing with mutantenemy, the swings are big!

great job but the swings are huge!

 Not your best work but it's a fresh new style for ya, the big tree could use a bit of editing though :)

 pretty plain, but it's nice work and I like the style

Much better than I can do right now :P

I hear ya. Isometric never really struck my fancy until recently. Lot of copy and paste.

I'll give you an obvious "Cars don't look too good," "Grass tiles aren't very detailed," and even though the buildings look great, "They are all way too similar." A very good start, however.