Itch io messes up node positions (browser version)

Hi!
I recently uploaded an html version of my game to itch.io. I works fine for the most part, but there is an annoying bug that prevents the player from finishing the game.

In essence, there is a point where the player needs to complete a text by clicking on buttons.

The problem is these buttons are displaced in the browser version, so parts of the text underneath become unreadable. Here is an image. Look at the beginning of the second line beneath “Background”.

The thing is everything looks fine in my computer. The problem comes when I upload it.

I think it has to do with itch.io streching the image, but I am not sure. Has anyone encountered this issue before?

As always, many thanks!

Is the itch version a different size than when you run it on your computer? Maybe it’s an issue with different resolutions?