I really like the celestial feel of this song, it’s very relaxing and fits your description of time flowing like a river. This song actually makes me imagine stars shimmering on a river in the moonlight, similar to the cover art you chose. I don't know how to explain it, but I think the way you used your chosen time signature mixed with the instruments you selected almost resembles flowing water in itself. It reminds me of Waterfall from Undertale, so maybe that's why the connection feels so strong to me. Anyways I really enjoyed this, great work!