Reply to Mashup-style Electro Remix

This is my first time trying to make a mashup-style remix of an electro track.

Songs Used:
Far Too Loud - Wake Up LA (Original Mix)
Virtu - Arsenal (Original Mix)
Mord Fustang - Lick the Rainbow (Original Mix)
Skrillex - Weekends! (Zedd Mix)

Constructive feedback is much appreciated.
http://soundcloud.com/nick-dubelman/moderately-filthy