Let's see... it's pretty sweet as it is, but here's some suggestions (assuming you're familiar with mixing). Try making the drums and piano a little louder, the bass synth a little quieter, and maybe compress the drums a bit. If nothing else, tone down that bass-y synth a bunch. Near the beginning, right where the piano comes in, the limiter instantly starts cutting out the bass. That definitely shouldn't be happening with only two instruments playing.
If you're feeling ambitious, you could also play with equalizers. The three main instruments bleed together a bit, so I think you could benefit from a bit of "frequency specialization", if you will. (I'm sure that there is actually a single word for that, but it's 2:30 AM, I'm tired, and I can't for the life of me remember what that word is.) Try bringing up the low frequencies on the bass, the midrange on the piano, and the highs on the lead. (And turn down everything else just a little bit, of course.)
I'm far from an expert on mixing, so I guess I'd have to actually be able to play with the levels myself to really be sure that what I'm telling you would sound good. Tinker with it a bit to see what you like.
