Hi Grenot, I've seen your video and your box art. Thanks for testing the rom on real HW. On LTO Flash you should be able to select ECS in the configuration menu to enable the 2nd psg.
The current rom should use it both during in-game music and for voice playback. I'm trying to change the musics in order to use 2 PSG's in all musics.
I see than on real TV the star field is almost invisible due to the fact that its color is not very bright. I could make more evident.
Moreover in this version, when you pick the double shoot (keep pressed '3' on the second controller and collect the flashing globes), the main ship start flickering (to make room to the extra bullets).
I'm curious to know if on real TV the result is acceptable.
In attach the last version with some small fixes
The game was broadly inspired by the 2nd stage of Gorf with a strong influence from Gyruss.