Clean and simple actually takes a lot of time.
It’s easy to make something clattered, but the cleaner and simpler design looks,
the harder likely was to produce it.
Design that looks simple requires a great deal of restraint and an expert eye for layout.
Since you’ve already put a time to clean layout adding further appeal to the visuals will be the quick final step.
With clean and simple design you have to judge every choice against whether or not it will further the story and if doesn’t, you opt against it.
What seems the cleanest and simple to you? Take a time and ask your friend or college the same question.
As you ask around you will find out the different answers.
Simple isn’t easy.