No nightmares for me lol...

This song ain't gonna do it nightmares wise. Maybe because of some the instrument choices you made and all. Like the high pitch playing brass or what is it?

This would make a good theme for a bad guy or monster thing planning secret things and taking over the world and stuff.

The song was a bit repetitive mainly because the piano could have used a break once in a while.

The song did set of some evil atmosphere wich was a good thing :)
Good luck with the contest.