I can hear a little bit of reverb at a high volume, but it's probably just the sample.
I personally like the saw wave sound in the back playing those 3 little notes.
I use that pattern a lot in my songs. :3
But yeah, I think it would sound better with some sort of bass filling in the background.
That nice low sound gives a song a nice deep feeling.
Either bass or reverb, one of them has to fill in some of the empty spaces in the song.