simple, yes.
It's a bit too simple is the problem. You could do a whole lot more with it and still be considered simplistic. That synth solo change up was nice. I think overall it needs a lot of work with the mixing. The main synth is way too loud, and it's causing clipping. The kick is solid, but it doesn't really belong in a song with constantly heavy bass. If you could put some side chaining on the bassline when the kick comes in it would make it soooo much smoother. That's the problem with having deep bass and a deep kick drum, they conflict with each other. When they have to fight each other in the same frequencies in ends up sounding horrible. All the changes throughout the song kept it going, but you need to move somewhere else other than just a solo line above the same bassline. The clipping from bad mixing is most noticable at around 4:15, when you mix the two synths. This could be a really good song, it just needs all the technical bits worked out first. I hope you take my advice, this song could be really fun.