Hi! Thanks! Sorry about those issues. The HTML5 version is a bit finicky for some reason... I'm not sure. It sometimes works fine and anothers doesn't.
About the MacOS version, it might be broken indeed. I first exported it from a mac and godot gave me the option to export it as a .dmg file but after that I used a Windows machine (which doesn't give you that option) and forgot to change the output file. I'll try and update it later.