Man this was NICE! I really like the build, and how smooth the sound is, seamless transitions, always a re-occurring groove, but the tempo varies, it keeps morphing yet never really changing too much...
The only element that doesn't entirely fit in IMO are the extra strings that get added in around 1:32, and a while later. Not just the tone but their tempo and melody too, it feels like a different kind of song for a moment.
Around 3:50 the melody seems a little simpler; messier for a moment too. But for a moment, then better and better again.
Overall this is really top-notch! Impressive how captivating it is despite the runtime, love the vibe, love the psychedelic; wavy finish, and the mix is polished, just the right amount of reverb and all.
You should be proud! :D Great work.
-cd-