Apparently this issue only affects some Analogue Pockets and only the latest OpenFPGA core. (info here) - could you try downgrading your core to 1.0 and let us know if it fixes the issue?
Downgraded to 1.0 and it works beautifully! Thank you so much for taking the time to find the fix. The game plays like a dream, so good.
It works for me, thanks :)
