🟡 Gameplay Feel
The flap feels responsive. I can't describe it, but the sound of is a bit uneasy on my ears.
The difficulty is definitely not frustrating for me, I scored 56 on my first try. Due to this long playtime for a round, I had less desire for 'one more try'.
You increase the difficulty by speeding up. I'd look into other options too, like moving obstacles for example.
🟡 itch.io Page Impressions
I would just start with the game's description on your page (maybe make this specific text bigger), without the title 'Description'. Also I'd reserve all-caps font for titles, not for longer text.
Your links are in red color, on red background. That's difficult to read. How would white look?