Pretty nice and soothing, I would make it bighter and more contrasted though, it's kind of a strain on the eyes right now.
Nice, clean and simple. The colours are a bit sad for a Happyland but hey, not every Happyland has to be the same. :D
Dig it but the colours are really quite drab. Being named Happyland, I'd expect higher contrast and saturation
Nice tiles :)
There is an obvious pattern on the dirt however.
I tried to tweak the colors according to what you said... Not sure about the result, though