Well hello there Mahlerian! I think I've seen you somewhere before
Looks like a good program. The pieces have plenty of contrast. Do not worry about playing more than one slow piece. The only thing that might demand some worry is the selection of a relatively intermediate level 20th c piece alongside pieces from the other periods that are more the expected level for college auditions. You don't want to give the impression that you just haven't played much 20th c rep and are reaching back a few years to the last nominally 20th thing you played. But if you really love Sunken Cathedral then make sure you're playing it in a well-thought-through manner with really good control of volume and tone, so it sounds appreciably different from an intermediate student. Sometimes technically easier pieces can turn out to be showcases for artistic ability. Don't let the opportunity pass you by. Good luck!