Cardboard Box Assembler: Play button doesn't appear

[n0samu]

Describe the bug

Download: CardboardBoxAssembler_LocalFLV.zip

Note: This is also affected by #11911, so you will need to delete the game's save data each time you test it, otherwise Ruffle will panic. And be sure to test this with #11815 merged in. Also, in Flash Player this will only work via a local web server because the SWF's security sandbox doesn't allow accessing local files.

In Cardboard Box Assembler, the Play button doesn't appear after the intro video plays. The relevant code is in the com.adultswim.Preroll class:

    public function onCuePoint(param1:Object) : void
    {
        trace("cuepoint: time=" + param1.time + " name=" + param1.name + " type=" + param1.type);
        switch(param1.name)
        {
            case "enterPlay":
                GlobalVarContainer.vars.bReady = true;
                this.nav = new Navigation();
        }
    }

onCuePoint does not trigger in Ruffle. We need an implementation like #11858 for AVM2.

Expected behavior

The Play button should appear after the intro video finishes playing.

Affected platform

Desktop app

Operating system

Windows 10

Browser

No response

Additional information

No response