I also encountered an issue in Chrome for mobile with capx attached to this message.
The error is :
Uncaught TypeError: Cannot read property 'isAmazonWebApp' of [...]Audio_plugin.js, line 2197 (col 69).
Error caught when previewing over Wifi in Chrome for android.
The capx/program doesn't go further the Check Failure message.
Tested in FireFox for android, without issue.
@aroderick: The capx links you provided are not complete and as such not visible.
Consider clicking "Full editor" and Upload attachment for the screenshots and capx.
Tested on Nexus 7 2012 - Lolipop 5.0.2