definately sounds like a nirvana song. One thing though, Most nirvana songs have more than 1 part. ( they usually have like 2 or 3) try adding another part, like a chorus or something. (if you had a chorus in there try changing the chords for that part so it stands out.
your guitar sounds out of tune (on both the songs in your myspace), practice your the vocals also. You may wanto to put a little reverb on the vox also so it blends with the acoustic a little better.
70's Japan Greco SuperPower
Amps: '65 TRRI - Peavey Classic 50 4x10 - Epiphone VJ Head (Modded) - 2x12 Celestion Greenback Cab
FX: BK Tube Driver - EH Small Stone - MXR CC
Acoustics: Breedlove ADSM20 - Alveraz 5021 12-String