We guessed that only 5 % of the players might create a level and 70 % would play user created levels. (gamesauce.biz)
After you are done playing the many levels of the campaign, you can play other user created levels online or you can create your own levels. (levelsmack.com)
This is my game of the year, I played some of the best user created levels I ever played last night. (n4g.com)