wow that looks really good, its pretty simple, colourful and easy on the eyes. Definite like.
ok... um... the nav's cute, reminds me of a little cloud
the title's nice, goes with the grass... why don't you put some orange in the grass aswell...maybe a few flowers or a butterfly or something
(but I guess baddermen who are under house arrest probably aren't into flowers and butterflies

)
The shape of the content box is awesome, goes with the cloud idea
I can't say i really like the shape of the background - although i understand the idea you're probably going for..the shape wants to be a bit more smooth and the angles better defined (imo). Also the fact that the cloud is just plain white makes it really strong and clashy which sort of recks the soft sky impression that your layout gives. Maybe some soft grey shading would ease that. (just a random thought - how about some vector birds in your sky?)
Finally, the grass at the bottom just ruins it for me. The shape is all uniform and the outlines make it look kinda childish... like its off supermario or something. I think the grass should stay there but you should make the shapes a little more creative