The bi-ba dialogue is a perfect solution honestly! From what little I’ve played of text-heavy narrative games I think quite a few of them choose to go down this route. I think the specific bi/ba samples you used for this is really nice and fit the vibe.
Yeah I had a feeling that the pitch was only meant to rise a little bit but instead it shortens to a click xD
I tested on Edge and Firefox and it happens in both browsers, perhaps Edge might be raising the pitch a little less though.
For the first time working with real sounds you did a really good job! There are still some sounds which are a bit harsh imo, like the planting sound, shovelling the plant, picking up the watering can. The footsteps particularly stood out to me. I think you’ve incorporated sharp (metallic) sounds? I’m not sure something that harsh and audible was needed for this game, though the sound design itself is quite nice.
About the music – I find myself disagreeing with how much attention it demands, if that makes sense. Both in how it’s present in the “voice” frequency regions and how the melody moves around a lot and asks you to follow it. But I also felt it adds a hopeful touch and emotional weight which was essential to the heart of the game.