So... I prosounded my pocket and sounds pretty effing good!! 
But for some reason when I press play on any tracks it reboots the cart... is this just the batteries running out? It doesn't seem to effect other games...
I haven't had time to check if it is the batteries yet...
Also as a side note... what would be the best lipo battery to fit? I've already got the USB charge board... planning a backlight too so will probably leave it at the 3.7v... just wondered if there's any particular type to go for that are better than others?
Ta peeps...