For the audio settings, yeah that's a bug that has been fixed in the Android version. There was some serious optimizations that we did as well (basically our waves were doing 45,000 floating point ops per frame... Oops).
Our primary platform is for Android which is why the controls are the mouse only.
If you have Android would be awesome if you could review that version as I think we addressed all of your concerns on it.
Thanks for your evaluation!