Ok, I think I've found the culprit, the audio folder in the project is 60 MB and there is a song that is 25 MB (the one of the 10% of a cat game) and another song that we didn't use that is another 12 MB, stuff that we used as a placeholder and I forgot to remove in the release.
I'll remove them in the next versions.
Thanks for pointing it out!
I can also give you one more recommendation about further optimization of godot. Compiling it from source with disabling unnecessary to your project features although it is a bit not flexible tool to cut unneeded thing or even use build_profiles which are a raw/experimental piece of ***** but work greatly