I think its the reverb amount. Reduce it all on every track by a fair bit. Then ease it up a tad, once everything sounds less pushed back. Boost the percussion by a fair bit and bingo! You can do this! 1:20 I think a half-tempo snare hit would do a lot to keep the intensity going, even on the slower breakdown. Same deal with 2:00 area I guess. Maybe some sort of rhythmic sequence to aid the slower parts feel more intense. That, or very Low piano and string notes. Pardon the edits :D

i really, really like this. very nice. it sounds a bit floaty (dont know how to describe it) but its really nice in some parts, especially the chiptune sounds