added some sound triggers and holes in the map

hero_select_card.gd

@@ -1,6 +1,7 @@
 extends PanelContainer
 
 signal pressed(hero_class)
+signal button_mouse_entered()
 
 var hero_class: HeroClass
 
@@ -13,3 +14,7 @@ func set_hero(hero: HeroClass):
 
 func _on_button_pressed() -> void:
 	pressed.emit(hero_class)
+
+
+func _on_button_mouse_entered() -> void:
+	button_mouse_entered.emit()