Desktop versus mobile
At first sight, the careless web developer might be led to believe that, because many of today's smart phones are in fact quite a lot smarter than most fifth graders, that their fancy web applications and games will run just fine on a mobile device. Do not be deceived! Although it is true that your smart phone is indeed smarter than you were when in fifth grade (in fact, most not-so-smart phones today have more computer power than the hardware that NASA used to take Neil A. Armstrong, Michael Collins, and Edwin E. Aldrin to the moon in 1969), it is in many instances no match to the average desktop computer from which most people surf the internet and play games online.
There are several significant differences between a desktop browser and a mobile browser. For this reason, we need to develop our applications with these differences in mind. After all, no matter how large the group of people only using the internet strictly from a mobile device or from a desktop browser...