Hey thanks, man! Both for the compliment and letting me know that it was too small. I change the dimensions of the piece so that the shortest side was 2000 pixels. Hopefully updating it won't mess up the entry itself!
No problem! You can edit your submission as many times as you like before the contest deadline, I've never had a problem when I edit for contests, I even made it as a semi-finalist once!
I know what you mean, I saw one entry a year or so ago get picked as a semi-finalist and then get removed for being 20 or so pixels too short, so it does happen and that sucks~