[quote name='Wolfpup']Whackos? You've got issues if you're threatened by a COLOR.[/quote]
Facts:
1. "Impulse" buyers outnumber buyers who watch trailers, pictures, read ten different previews of a game before it even starts printing, and reads ten different reviews before making a decision to buy or not.
2. Everyone (not just impulse buyers) relies on first impression at a subconscious level. Note: Apparently, Wolfpup has the innate ability to bypass this very human nature that even God cannot manipulate.
3. Impulse buyers then uses their senses, advertisement (THE COVER IS ALSO AN ADVERTISEMENT STIMULUS - NO ONE SELLS A BLANK CASE GAME), and word-of-mouth. In other words, they look at the games and guess which one will entertain the game player the most.
4. Skillful, professional people are employed in the public relations, marketing, and research & development sectors and get paid more than you and I ever will. They are always studying and monitoring who, what, when, where, and how to sell a game.
This is a typical lineup at game stores:
http://www.gamestop.com/product.asp?product_id=200131 
Out of all those games, which two (2) games are more likely to catch the interests of parent(s) and their child(ren), particularly girls? Ok. Which two games are LEAST LIKELY to catch the attention of male teenagers-young adults-adults? What do these two games have in common at first glance?
How about no guns, less realism (animals), lack of mayhem (no fire, destruction), obscure title name without words like "War", "Smack", or "Fight", and color(ful). You do know that if you are hooked up to a machine that monitors your blood pressure and heart rate and are shown images and colors, your body actually reacts at a level in which you can't immediately sense, right? This is Marketing, Psychology, and Common Sense 101. I rest my case.
You'll probably say something subjective and stupid like "Well, it could be any game because it depends on what the parents allow their children to play."
Do yourself a favor and never enter a school or career that specializes in social sciences, advertisement design, public relations, video games, research & development, and/or marketing.
ing do get harder as it goes, and they are a fun element to break up the core game, and do get extremely challenging at the end. I've broken some pinata hearts because I failed a mini game. 
