I turned mipmapping off to save memory but I can try and turn it back on.
What did you do to get the sound bug? The game should run through all the fx and turn them off, then I release the soundpool and reinitialize it.
Is it the helicopter engine that keeps playing? Was it after getting killed, or running out of fuel or just exitting using the map/menu exit button?
And yes, please put it on the projects page. I'd be honoured.