Thank you! The GB palette was has been an itch for a long time and this time it just came together. If I don't continue with this game, I'm really tempted to do another using the GB palette and resolution.
I agree with you on the input feedback, the sounds do help with that, it can go up a few levels by pressing the [+] key on the keyboard, I didn't display the volume changes, but it starts at 7 and goes up to 10.