I like the vibes! Couple of things that stuck out on my first listen was that the 808 bass was a bit too loud/boomy, maybe lowering the volume or cutting a bit of the really low parts of the sound with an EQ (meaning in the sub 30~hz or so area) might help tame it a bit (not really a master mixer myself so take this with a grain of salt :D ). And the lines you have for the different instruments are nice, but you could add some variation to the lines after they have already repeated once (maybe something as simple as, if the line originally ended by descending, you could try having the second repeat ascend instead), this helps to keep the music feeling like its progressing and gives some more interest to the listener.
Sorry for the wall of text but just trying offer advice, good job on these!