Yeah anon contest doesn't help... and if you were posting late probably it was supposed to be worse.
I agree with pakimo about the mix of realistic & cartoon. Maybe it was better to give a cartoonish style to the whole image.
I don't hate parrot like ReinDude, but I don't think it is a good touch... maybe too colorful, it's a bit distracting if we consider the dinosaur the important creature of your image. I think maybe it was better to add a prehistoric bird... not colorful, something melting well with the background.
The rays of light need some work. I fell it just white... it needs some different shades and intensity to make it more natural & realistic especially over the dark parts of background. Adding blur to it can be good... I think we feel too many thin lines.
The dino looks way too flat. Look at the rocks on the right or foreground... there's strong shadows on front side, good light on top. So you need to do the same look to the dinosaur.
For a better dept the foreground needs blur.
And finally it was maybe good to add a mood to the image... like adding contrast & darkness. I feel the whole image a bit flat.
I hope it can help!