An EDM track with no (conventional) percussion? That's an interesting idea, and I'm surprised that you executed it so well here. My only criticism is that the synths that you used for the melody could be more "full", for the lack of a better term. You could try to add more bandwidth, stereo space, or harmonics to accomplish this; I would highly recommend listening to some ambient music to hear a good example of how to do this. Also, you should add some background sounds to the parts where you can only hear the extratone drums; these parts sound kind of boring without anything else going on. Other than these two things, this song is very good! I especially like how you made the extratone drums very soothing, which is otherwise unusual for that type of drum arrangement. I also like how you added some sidechaining to the synths during the "drops"; they add a nice driving pulse in the absence of actual drums! Keep up the great work!