Overall, I like it. All of the additions and tweaks you made fit the source material well, especially the riff you added just before fading out.
One gripe I have is that this feels like the sort of song I'd queue up two or three times in my music player before moving on to another song, and the fade out messes with that. I think it would have been more appropriate to make it loop instead.
The other thing I noticed is with the... organ? Is it an organ? I'll clarify that with you later, but anyway, the source had more jazzy detail in the timing of the organ's notes, and I don't think the remix managed to capture or improve on that very well. The source times the start of its notes well and cuts them off in interesting ways, where I feel like your notes start and end more evenly with the beat.
To sum up, I think the _sounds_ that you you used were cleaner and more interesting, and your additions were well chosen and well placed, but the original was able to put more personality into its organ.
Looking forward to hearing what you make next!