Nice bassline, but overall this tracks is a little static and thin.

The kick is a little dull, and could do with more depth and a little top. Maybe some warm compression.

The 303 is too far back in the mix, and is a little flat.

I think overall the sounds are too thin. Using some nice saturation compression on individual sounds, and some subtle delays to fill the mix a little will help phatten this up.

Also learn about subtractive eq, it will help you to fill the mix more efectively.