That’s already enough time to create your art piece, I hope there will be no extension since it will be unfair to those who submitted their art work in time. If you are is already available, better to submit it now so you can have the advantage of being the first and unique art. Anyway, you still have time to prepare for it and make it perfect, I expect more participants for this round, the competition is getting tougher.
Usually we have more then a month in most of them which gives user ample of time as stated in the contest details also but there are sometimes when user request or the team find it suitable to extend it little say about 2-3 days but it's fine as user whose entry the team will like have chances of winning.Have seen some good art submission already so waiting for more to come but also sad that I didn't get time to create one myself.So best wishes to all participants.