src/de/steamwar/misslewars/listener/ItemListener.java

@@ -89,6 +89,10 @@ public class ItemListener extends BasicListener {
 	@EventHandler
 	public void onInventoryClick(InventoryClickEvent event) {
 		Inventory clicked = event.getClickedInventory();
+		if(MissileWars.getFightState() != FightState.FIGHTING) {
+			event.setCancelled(true);
+			return;
+		}
 		if(event.getClick().isShiftClick()){
 			ItemStack clickedOn = event.getCurrentItem();