Nice un
This might be the first pixelart flood pic... i dunno. Nice colors in this one.
The shading is a bit odd, especially on the bunny, unless thats supposed to be spots on his fur. Otherwise it looks as if the light is coming from below him.
On the sky; Id suggest flipping the gradient (and spacing it a bit more) since the sun is high; the sky would be lighter at the top. (at night, when the sun is below the horizon; the sky is darker at the top)