Hmm nice remix, cool tunes & pretty good sctructure.
You need to work on the mastering. Your song is clipping (distorting) at some parts, u should compress the master channel to prevent clipping.
Also, ur drums samples kinda suck. Find better ones, like the ones from www.vipzone-samples.com, theres free good drumsamples.
Also, make ur song less repeative by putting some variation in there.
Add some fx (reverb, EQ, delay, filtering.) to ur leads & drums to make them nicer.
Keep it up!