Building Billy Frontier on Linux with gcc 12, I get:

.../billy-frontier/src/billy-frontier/Source/System/Main.c: In function ‘PlayGame_Arcade’:
.../billy-frontier/src/billy-frontier/Source/System/Main.c:163:55: warning: comparison is always false due to limited range of data type [-Wtype-limits]
  163 |                                 if (gPlayerInfo.lives < 0)
      |                                                       ^
.../billy-frontier/src/billy-frontier/Source/System/Main.c:217:47: warning: comparison is always false due to limited range of data type [-Wtype-limits]
  217 |                         if (gPlayerInfo.lives < 0)
      |                                               ^

In player.h, the definition of lives is SInt8. That's an old Apple datatype, which you have defined in Pomme. The problem is that Pomme defines it as typedef char SInt8;, but char is unsigned as per the C Language Specification, leading to the above.

I was wondering if Video Mode settings and regular settings could be somehow added back in? Or, if there's some other way to change the size of the game window, that'd be awesome. It looks like the video mode settings were removed with this commit. Thanks!

Howdy ! :) This game also works fine now, except one issue : while sounds are good, music are distored , like not endian swapped. But gameplay itself and whole game in terms of colors, etc all fine.

The ReadMe says we can skip the dual. What is the ⊞key? Is this referring to the Windows key? The equivalent keystroke on Linux Super+F10 does not seem to manifest this cheat.

Well, another fantastic modern port! Thank you again! 🤠