I really dig the switch at 1:10, not so much the one at 1:30 though. I would say this is more of a techno song than a ska one though, its the the upbeat offbeats and feel of it though. I also think this song would be vastly improved by some pingpong left right effects on some of the lead melodies.
I really like the synthed horns at :50 as well, probably my favorite part =D
4.5/5