I have a few challenges that you can do at anytime. Since I haven't become an Otakuite++, yet. This is for fun and hopefully I'll gain the Otakuite++ soon. Ok, the challenges are below. There are plenty of challenges and they can be used/taken more then once.
Page 2) 1st challenge: Joining Worlds (Free Choice)
Page 3) 2nd challenge: Riddles, Puzzles and Hidden Codes
Page 4) 3rd challenge: Artwork challenge
Page 5) 4th challenge: Other challenges (Coming Soon...)
Page 6) Art Requests or Art Trades
Page 7) My To Do List: Pictures Appearing in Manga or as Fanart