Maxwell is a spy! Help him infiltrate the party.
First, get through the security and front door by dress up Maxwell:

Round 1: Suit
Round 2: Tuxedo
Round 3: Gown

Second, rendezvous with the contact to get the key card. To the far right, you will see a woman holding the key card. Give her the following in exchange:
Round 1: Tulip
Round 2: Daisy
Round 3: Rose

Alternatively, you can just give her anything random like “spoon” and she will “drop” the key card. You will simply have to pick it up fast.

Equip with a flying device, travel to the computer room on the top left, run pass the security, and use the computer to disable the camera.
Round 1: Wings
Round 2: Flying shoes
Round 3: Jet pack

You will need to put the guard to sleep with the following gears:
Round 1: Tranquilizer Dart
Round 2: Tranquilizer Gun
Round 3: Stun Gun

Run pass the security again to the room on the right where Maxwell will retrieve the intel from the safe. After you grab the intel, the door to the right will shut.

Re-fill it with anything such as flower, rock, or spoon. The gate will then open, and Maxwell will escape to the speed boat waiting on the bottom right of the level.

Scribblenauts Remix 11-5 Cheats Hints gallery:
11-5-1-a: Infiltrate the party! Do not harm anyone!
11-5-1-b: Only well dressed people can enter.
11-5-1-c: Give Maxwell a tuxedo or suit.

11-5-2-a: Rendevous with the contact to get the key card!
11-5-2-b: Your contact will trade the keycard for a romantic gift.
11-5-2-c: What do all the other women have in their hands?

11-5-3-a: Use the computer to disable the camera!
11-5-3-b: Put the Guard to sleep to get to the computer.
11-5-3-c: Use a tranquilizer gun on the guard.

11-5-4-a: Retrieve the intel from the safe and escape!
11-5-4-b: The door and the safe are connected.
11-5-4-c: The door only opens when the safe is full.