This is nice and relaxing. Nice sounds of choice.
Structure it's simple, but fits the calm vibe of the track.
There's a couple of areas to improve on this piece :
- Give your main synth a shorter decay / release time so your notes do not stack creating that brief but noticeable dissonance.
- You can transport the sliding synth one octave up or change the waveform. Those notes are on the same register as your main synth and the wave it's similar, so both of them blend and the detail can't be fully appreciated.

Keep the good work mate.