I made this a while back for the Win 8 store, but without much attention there so I have ported it to WP8 and Android.
Testing Construct 2 export options out, it seems WP8.x still has problems with html 5 audio. I had to resort to the old WP8 plugin to get sounds working.
Windows Mobile 10 is pretty much perfect when it comes to audio.
The framerate in W10 is also way smoother even on an Lumia 735, but unfortunately had to target WP8 as we're still waiting on the latest release.