I like that you can create your own custom games, as well as play other people's creations! You have to pay for each game you make or upload (unless it is free).
This makes it extremely expensive if you want to do this regularly. It would be nice to be able to use some of my fanfic money to purchase more credits so I could continue uploading content without having to worry about running out of money. The ability to share our work with others who are interested in writing stories or drawing pictures we enjoy.