Snaptrap is playing a game called World of Ratcraft which is a parody of the online game, World of Warcraft.
The scene where Dudley, Kitty, and Keswick get the power source in his lab and a couple of traps spring up is a reference to the movie Indiana Jones.
We learned that Keswick has interacted with aliens while working at T.U.F.F.:
He gave the Aliens DNA samples of Dudley and Kitty in exchange for a power source.
He plans to help the Aliens invade the Earth if they can call it Planet Keswick.
When Dudley is playing Chicken Zombies 2, when you look closely at the console, it is a Y-Box which is a parody of the Xbox 360.
While Snaptrap plays World of Ratcraft, he seems to be playing it with a remote on the TV. This could be a parody of the Wii. Dudley also seems to be playing Chicken Zombies 2 on a playing board like the Wii Balance Board.
This is the second time where a burrito got cooked in the microwave. The first time was in Puppy Love.
This is the second time where you see Keswick without his glasses. The first time was in Share-A-Lair.
Bird Brain saying Duck's name, and then Bat and Owl duck.