In 'Communication' the snare isn't loud enough and the kick might be a little bit too loud in the mix
In 'First Contact' you have a clever use of panning but whatever you panned to the far right sounds weird as loud as it is over there by itself
   The only other feedback that I could really give is that they all are just a tad repetitive but the mixes sound pretty good but sometimes the bass can be a little bit loud (not overpowering, just loud)