Well done for your third track! But I have to admit after I just listened to your other to tracks that they were actually a bit better. You spent much more time on them, developing melodies than in this one here. The lead in this track is more like shifting arpeggiated chords. It would be nice to see some melody above them because otherwise the track gets repetitive very fast. The beat was nice though. When I remember the time I started doing music on my computer I always had problems to come up with a solid beat. For the production I would say similar things like the other reviewers: Listen to the track carefully and you will here that there are some points where the lead is just covered by the other instruments and it appears much more silent. Maybe MegaMettaurX is right and your volume levels are not proper (like to loud in general in the mixing producing some artifacts during the rendering). Play a bit with the mixing. First I would try to play a bit with the volumes of the different instruments, then maybe with giving them some own "direction" in the mix by panning them a bit to the left or right. Like xenxies suggested limiters and compressors are also something you should learn to use. They could already help to get rid of the volume problem in this track. The suggestion with the velocities is also a good one.
Keep up in doing some nice music! Looking forward to hear more from you (P.S. I really liked the Toybox Groove which definetely would be a nice game music track).