Listened to some of your songs - just about all of them aren't in time or in tune with each other - I'd suggest if you're doing multi-track recordings, first of all use a click track or a metronome so nothing's behind or ahead, and also make sure the bass and guitar are in tune with each other - the Donkey Kong title was really out of tune, the bass sounded sharp compared to the guitar - and sometimes the bass and drums weren't together. Hope to hear some improvements, check out my stuff, I got some video game remixes.