The text FX is a little much, feels almost like a demo for transition presets :P I think it would be better if it was a little less in your face, more toned down. Also, you might want to try some color/transparency/shadows for the text, since pure white feels very out of place together with the dark image.
The Nightcore itself seems to be done well, but the audio quality of the video is pretty poor. I'm fairly sure that your render settings for audio are off, they should be set to 44.1 kHz with the bit rate as close to 320 kbps as possible.
Also, the song ends very abruptly, sounds like it's just been cut off. What's up with that?
You want to include the full song info somewhere, which is typically done in the form: "George Acosta feat. Truth - Mellodrama (Gareth Emery Remix)"