I'm confused. Super high frequencies? I don't remember putting any of those in there; maybe the song got messed up during the mixdown. Could you be a little more specific about what they are? Also, were you using speakers or headphones?
Edit: Just listened to it again; did you, by chance, mean the blippy synth that comes in halfway? If so - woops. Meant to lower that a bit. Sorry. I should also fix some of the "entrances and exits", so to speak. Guess this is what I get for rushing to get it done before bed...
P.S. Never said it was great, btw. This is just a quickie I had fun making; I didn't put a lot of time or effort into it.