Can you at least make the trucks and helicopters sent their deliveries finish completely first then you end the level?Its not completely finished without finishing a level.
If i can say a few things,i suggest not to take rembrant the bloody , the last level will be alot more harder for you.Maybe if you pick the others,it will be a bit easier.
Can the invisible zombie in zombie mode be fix?Fix those bugs first before u improve the game..the zombie bug have been months already,please fix it :D