added the game

Scenes/Parts/colour_palette.gdshader

@@ -0,0 +1,52 @@
+shader_type canvas_item;
+
+uniform sampler2D screen_texture : hint_screen_texture, filter_nearest;
+uniform sampler2D palette_texture;
+uniform vec4 shadow_colour : source_color;
+uniform float y_offset : hint_range(0, 2);
+uniform int palette_size = 8;
+
+uniform bool is_debug = false;
+
+int get_palette_index(vec4 color) {
+    ivec4 quantized_color = ivec4(floor(color * 255.0 + 0.5)); // Quantize the color
+
+    for (int i = 0; i < palette_size; i++) {
+        float index = (float(i) + 0.5) / float(palette_size); // Sample at the center of each color slot
+        vec4 palette_color = texture(palette_texture, vec2(index, 0.0));
+
+        ivec4 quantized_palette = ivec4(floor(palette_color * 255.0 + 0.5)); // Quantize the palette color
+
+        if (quantized_color == quantized_palette) {
+            return i; // Found exact match
+        }
+    }
+
+    return -1; // No match found
+}
+
+void fragment() {
+    vec4 screen_color = texture(screen_texture, SCREEN_UV);
+
+    // Check if the color is close to the shadow colo
+
+    int palette_index;
+
+    palette_index = get_palette_index(screen_color);
+
+    // Normalize the palette index for UV lookup
+    if (palette_index != -1) {
+        float palette_uv_x = (float(palette_index) + 0.5) / float(palette_size);
+        float palette_uv_y = (float(y_offset) + 0.5) / float(3);
+        COLOR = texture(palette_texture, vec2(palette_uv_x, palette_uv_y));
+    } else {
+        // Fallback if no match (this should only happen if no matching palette index is found)
+		if (is_debug)
+		{
+			COLOR = texture(palette_texture, vec2(float(palette_size), 0.0));
+		} else
+		{
+			COLOR = screen_color;
+		}
+    }
+}