I'm sorry, but i cant give you more... this game is broken, at least for me as the moment i try to enter teh upgrade screen it gives me this message:
"An exception has occured, but exception handling has been disabled in this build. If you are the developer of this content, enable exceptions in your project's WebGL player settings to be able to catch the exception or see the stack trace."
It's hard to enjoy a game that i can't even play properly, and this looks real good visually, but so far it hasn't worked properly.