Solve those issues and add ful screen as an option and I will enjoy playing this nice game!
I think the rain sound and the music are enough. I guess the sound you hear when the character stands on a platform is just supposed to appear when you walk.
The rain sounds very pleasant to me. The music stutters at times, and I find the sounds you hear when the character stands on a platform very unpleasant. I like the game itself. I would recommend adding full screen as an option.
Could you update the Windows version so that the game can be played in full screen? You can maximize the window, but I'd like to play it in full screen.