Aw StormCloud! I hope she finds a kind friend. The visuals of this were beautiful, and I loved the small but thoughtful detail of panning the rain sound back and forth as you traveled through the game, that was great.
A few quality of life tweaks I would make that I think might really help:
-At the end of your world, if possible, set a fog or blurred out edge of the world, I think it will help a lot from breaking the player out of the scene when they see rain, for instance falling into darkness. Something like a fog or faded BG could really help mask it
-I think the rain noise + a soft, emotive soundtrack in the background would really bring the whole cozy, emotional vibe together.
Such a massive effort for one person in 4 days, extremely well done!