DJ SymBiotiX is correct - your audio interface has no effect on the end product insomuch as to how it sounds, and judging by the song, you shouldn't have even necessarily needed an audio interface to even make it. The purpose of an audio interface is for the most part to provide the computer with connectors to a host of music recording/monitoring devices with standardized ports. It does not make a recording better or worse. The only issue I have heard of with audio interfaces with regards to music is input delay. Mixing/mastering can be done with headphones as well, so a good audio interface isn't vital there unless you want the absolute top notch mixing/mastering done, and even then you need the skills & monitoring equipment first.
Stop spreading misinformation.
As for the song itself, the samples aren't that great, and there are mixing issues abound. Clarity is lacking quite a bit, and the song sounds thin on the mid-high frequencies.