The lighting on the top right of the balloon is inconsistent with the very obvious low sunset...
Also, the lettering looks flat, and does not conform to the shape of the balloon, in addition to being difficult to read because the left side of the image is too dark.
I'd lighten the overall image, bend the type to fit around the balloon better, and correct that top lighting.

now its better?

I think there should be no light effect on the balloon but around the balloon. Because you are facing the sun, so there should be a lights coming out from the behind of the balloon. May be it is a rays of light and it stretched out (but it should be very thin because it is a sunset). and there should be a small diffuse light on the lower right of the balloon because it face the sun and also to give it a 3d sphere shape. I also think that texts were write on the balloon, so it would be round like a balloon, so you can use a warp tool to do so.