A Better Unity WebGL template
I have no idea why Unity choose to not make its WebGL exporter default to filling the window like pretty much all other WebGL apps on the net but in any case here is a template
Downloand and add in this unity package
into your project. Then pick
Edit->Project Settings->Player, in the WebGL tab
under Resolution and Presentation pick "BetterTemplate".
Assets/WebGLTemplates/BetterTemplate/logo.png to whatever you want.
See Unity docs on how to customize WebGL Templates.
Try to make mobile dialog appear above logo.
It's a little sad that Unity hard coded this rather than make it some kind of event and/or make the template itself handle this. The issue is there's no easy way to know if the inserted elements are the mobile warning or something else.
I suppose could check if the game has actually loaded. If no it's the mobile warning. If yes then disable the CSS. Oh well, burn that bridge when we get there.
Fix logo size css
Add viewport tag