feat: Implement core player movement with advanced pushing mechanics, define game modes, and introduce various new managers and UI components.

scripts/ui/powerup_inventory_ui.gd

@@ -1,5 +1,7 @@
 extends Control
 
+
+
 # PowerUpInventoryUI - Displays stored powerups and handles selection
 
 # UI References
@@ -146,6 +148,12 @@ func _update_btn_shortcut(effect_id: int, btn: Button):
 	var is_sng = mode == GameMode.Mode.STOP_N_GO
 	
 	var key_text = ""
+	
+	# Safety check for SettingsManager (Autoload)
+	if not SettingsManager:
+		sc_lbl.text = ""
+		return
+
 	if is_sng:
 		match effect_id:
 			0: key_text = SettingsManager.get_control_text("powerup_1")