Gotta work on that mix. Your lead was way too loud. A lot of the elements around the 6:00 sounded very random. Take some time and review other music of these particular genres. Maybe that could help you write your ideas down better for these particular genres.
I'm not entirely sure what's the point of making this 18 minutes. Nothing really new was added.
Your piano melodies do not really make sense at the 15 minute mark. You gotta really focus on following a certain idea and go with there, that way it will sound less random
I would personally not use those "eurotrance arp synths" that you used here. It's an oldie sound and not particularly interesting.
Pick some better sounds and be mindful when writing melodies next time!