It's OK. You could make it better, however, if you will use different timbres, different instrument lengths for the hats, lower bass. For now it sounds slightly monotonous.
It's cool but it sounds like you forgot to add a kick and snare sound. I'd look into using the DPCM channel and get a kick and snare sound in there. Bass could use more movement and some more low notes as Dave said and should also try to add some dynamics with the volume channel to accentuate phrases. Not a bad effort though, just needs polishing!
