Above the test chamber, there is a rail for Wheatley to travel across, he can attach to it using the small clip on his back. To the right of the cake there is the room that Chell first wakes up in at the beginning of Portal 1, with her pod-bed and her toilet, with a wall that you can easily see through due to the trans-clear panels built into it. Under that area, there’s the cake! A simple 7-piece build that looks just like the one in the game.
The main build is an Aperture Science Test Chamber, with an orange portal on the higher wall for Chell to ambush the Sentey Turret, with a blue portal that opens on a wall next to a large red button on the floor. Now, onto a brief description of the model itself. It took me around 4 days to build, with many improvements along the way, and of course, the very large update. The brick-built characters include Wheatley, an Aperture Science Sentry Turret and GLaDOS, with a little security camera at the top of the build for GLaDOS to watch Chell complete this test. I also made custom minifigures of Chell from Portal 1 and Cave Johnson to go in his portrait. This model is based off the game Portal 2, with the Chell minifigure from the LEGO Dimensions level pack.