itch.io

I agree with non-ajustable window and the hitbox of the platforms. And with vertical platforms it is more then a minor issue, because when trying to jump on a verticaly placed platform, half of the side that is on top then has no hitbox.
Pause option would also be nice.

Audio and manual closing is not that important in my opinion, because it is all easily doable with your computer settings.

The mouse capture isn't perfect, if you do multiple fast jumps in the same direction it wonders of screen.

Edit:I think it happens, because in the fast movement I click and the cursor locks while I'm still pulling back my mouse to get enough space for the next jump.