it's a brilliant mix. really does have the whole laser rave vibe going for it.
also, for the guy who wants to know what the songs are:
Sky Sanctuary Zone (Sonic & Knuckles)
Twinkle Park (Sonic Adventure 1), Though it is also Puppet Panic Zone (Sonic 3D)
Ice Cap Zone (Sonic 3)
Diamond Dust Zone (Sonic 3D)
now when I first listened to this song I could most definately hear the summer theme to it. it has a very pleasant melody to it that really has the potential to make people feel warm and "summery" inside. However, I couldnt hear any resemblence or releation to defcon zero at all. Which in all honesty just makes it look like you wanted some free popularity and threw "defcon" into the title. Now I'm not saying you did this but Defcon Zero is a massively popular track on newgrounds and even I was drawn to your track because of the word "defcon" I was expecting a remix or something.
all in all I'm giving your track an 8, it would have gotten 9. but I deducted 1 due to the unnecessary title. Great track non the less
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