Aggiungi schermata crediti (SELECT nel menu titolo)

SELECT nel menu titolo mostra i crediti: titolo, autore (Matteo B.),
strumenti (GBDK 2020, SDCC SM83, PyBoy). B per tornare al titolo.
Usa il Window layer (come le istruzioni) per non corrompere il BG map.

Ricrea i file src/screens/ rimossi da make clean (death.c,
instructions.c, screens.c) e aggiunge credits.c.

src/globals.c

@@ -47,3 +47,4 @@ int16_t enemy_target_px[MAX_ENEMIES], enemy_target_py[MAX_ENEMIES];
 uint8_t enemy_cooldown[MAX_ENEMIES] = {0};
 volatile uint8_t hint_active = 0;
 volatile uint8_t hint_displayed = 0;
+volatile uint8_t credits_active = 0;

src/globals.h

@@ -82,4 +82,8 @@ extern uint8_t enemy_cooldown[MAX_ENEMIES];
 extern volatile uint8_t hint_active;
 extern volatile uint8_t hint_displayed;
 
+// --- Credits Screen ---
+// credits_active: 1 = mostra la schermata crediti (SELECT nel menu titolo)
+extern volatile uint8_t credits_active;
+
 #endif

src/main.c

@@ -1,33 +1,52 @@
 #include <gb/gb.h>
 #include "engine.h"
 #include "globals.h"
+#include "screens/screens.h"
+#include "title_bg.h"
 
 uint8_t app_state = 0; // 0 = title, 1 = game
 
 void main(void) {
     title_init();
-    
+
     SHOW_BKG;
     SHOW_SPRITES;
     DISPLAY_ON;
-    
+
     uint8_t prev_keys = 0;
-    
+
     while (1) {
         wait_vbl_done();
         uint8_t keys = joypad();
-        
+
         if (app_state == 0) {
-            title_update(keys, prev_keys);
-            if ((keys & J_START) && !(prev_keys & J_START)) {
-                app_state = 1;
-                level = 1; // Nuova partita dal livello 1
-                engine_init();
+            // Schermata crediti attiva: B per tornare al titolo
+            if (credits_active) {
+                if ((keys & J_B) && !(prev_keys & J_B)) {
+                    HIDE_WIN;
+                    BGP_REG = 0xE4;
+                    // Ripristina i tile del titolo (font li aveva sovrascritti)
+                    set_bkg_data(0, title_bg_TILE_COUNT, title_bg_tiles);
+                    set_bkg_tiles(0, 0, title_bg_WIDTH / 8, title_bg_HEIGHT / 8, title_bg_map);
+                    credits_active = 0;
+                }
+            } else {
+                title_update(keys, prev_keys);
+                if ((keys & J_START) && !(prev_keys & J_START)) {
+                    app_state = 1;
+                    level = 1; // Nuova partita dal livello 1
+                    engine_init();
+                }
+                // SELECT nel titolo: mostra i crediti
+                if ((keys & J_SELECT) && !(prev_keys & J_SELECT)) {
+                    show_credits();
+                    credits_active = 1;
+                }
             }
         } else {
             engine_update(keys, prev_keys);
         }
-        
+
         prev_keys = keys;
     }
 }

src/screens/credits.c

@@ -0,0 +1,26 @@
+#include "screens.h"
+#include "../globals.h"
+#include <string.h>
+
+// Schermata dei crediti (SELECT nel menu titolo). Usa il Window layer.
+// Il BG map del titolo resta intatto -> tornando al titolo niente garbage.
+void show_credits(void) {
+    HIDE_SPRITES;
+    font_init();
+    font_t cr_font = font_load(font_ibm);
+    font_set(cr_font);
+    BGP_REG = 0x1B; // palette invertita (sfondo nero, testo chiaro)
+    memset(map_buffer, 0, sizeof(map_buffer));
+    ending_puttext(3, 1,  "A SCREAM FROM");
+    ending_puttext(6, 2,  "THE DARK");
+    ending_puttext(2, 5,  "A GAME BY");
+    ending_puttext(3, 6,  "MATTEO B.");
+    ending_puttext(2, 9,  "GBDK 2020");
+    ending_puttext(2, 10, "SDCC SM83");
+    ending_puttext(2, 11, "PYBOY TEST");
+    ending_puttext(1, 14, "PRESS B TO RETURN");
+    // Window layer: tile map separato dal BG
+    set_win_tiles(0, 0, 32, 32, map_buffer);
+    move_win(7, 0);
+    SHOW_WIN;
+}

src/screens/death.c

@@ -12,9 +12,11 @@ void show_death(void) {
     font_t dead_font = font_load(font_ibm);
     font_set(dead_font);
     memset(map_buffer, 0, sizeof(map_buffer));
-    ending_puttext(2, 5,  "THE DARK CLAIMED");
-    ending_puttext(8, 7,  "YOU");
-    ending_puttext(4, 14, "PRESS START");
-    ending_puttext(5, 15, "AND RETRY");
+    ending_puttext(5, 3,  "YOU DIED");
+    ending_puttext(2, 5,  "THE DARK CLAIMS");
+    ending_puttext(5, 6,  "ANOTHER");
+    ending_puttext(2, 9,  "JUST ANOTHER SCREAM");
+    ending_puttext(3, 10, "FROM THE DARK.");
+    ending_puttext(5, 14, "GAME OVER");
     set_bkg_tiles(0, 0, 32, 32, map_buffer);
 }

src/screens/instructions.c

@@ -11,13 +11,12 @@ void show_instructions(void) {
     font_set(hint_font);
     BGP_REG = 0x1B; // palette invertita (sfondo nero, testo chiaro)
     memset(map_buffer, 0, sizeof(map_buffer));
-
-    ending_puttext(3, 2, "FIND THE HATCH");
-    ending_puttext(4, 8, "DPAD WALK");
-    ending_puttext(2, 9, "A + DPAD JUMP");
+    ending_puttext(3, 3,  "FIND THE HATCH");
+    ending_puttext(5, 7,  "DPAD WALK");
+    ending_puttext(2, 9,  "A + DPAD JUMP");
     ending_puttext(2, 10, "B + DPAD RUN");
-    ending_puttext(2, 12, "PRESS B");
-    ending_puttext(2, 13, "TO CONTINUE");
+    ending_puttext(2, 13, "PRESS B TO CONTINUE");
+    ending_puttext(4, 14, "SELECT: HELP");
     // Window layer: tile map separato (0x9C00) dal BG (0x9800)
     set_win_tiles(0, 0, 32, 32, map_buffer);
     move_win(7, 0); // -7 pixel offset: allinea a sinistra

src/screens/screens.h

@@ -26,6 +26,9 @@ void show_going_deeper(void);
 // Schermata del finale tragico (game_over == 3)
 void show_finale(void);
 
+// Schermata dei crediti (SELECT nel menu titolo)
+void show_credits(void);
+
 // Helper condivisi (definiti in screens.c)
 void ending_puttext(uint8_t col, uint8_t row, const char *s);
 void ending_putdigit(uint8_t col, uint8_t row, uint8_t digit);