Hi,
It's a really good composition in an early '60's vein for sure. I don't think the mix is doing it justice at all though...
That snare sound is truly awful imo. Sorry, but it sounds almost like another cymbal (as VHS mentioned), it's so thin and harsh. It's really pretty extreme actually. Not sure what is going on there? In another, more electronic genre it might fit better, but it just sounds so, so out of place to me on this kind of a track which could potentially sound much more authentic and natural.
Anyway, I also felt the bass was kind of indistinct and rumbly.
Your vocal track could be processed to sound warmer too. It sounded a bit harsh.
Good performances though! I would recommend drastic changes to the drum sound to get them warmer and more natural sounding, maybe some different eq or other processing on the vocals, and then you might be in the ballpark.
What's your monitoring situation?