Hi managed to have a bit of a play. I couldn't get the game full screen it just played in window on a full screen with black around it. With the voice filter maybe lessen the pitch or turn volume up slightly but i get that you were going for secret agent distorted type voice so wanted it to sound sinister or more mysterious. I like wandering around the city and dodging getting spotted couldn't work out where the package had to go so just randomly threw it into doors of house however i guess it wasn't meant to go in them as it clipped through the doors or walls of house.
So besides the above and not having a clue where to put package i liked you soundtrack and get the vibe you were trying to create with the game :)