The GameCamera 2.5D cannot move. It's a convenience tool - it makes it easy to tie it to a background, but this means it can't be moved.
@klarax is correct (thanks!) - you can place a GameCamera prefab in the scene and use that instead. Since your game is 2.5D, and GameCameras are intended for 3D games, it won't be listed in your Scene Manager - but you can still find it in your Project window under /Assets/AdventureCreator/Prefabs/Camera.
However, I'm guessing that when the camera moves, you'll want perspective to remain the same (i.e. a Ken Burns effect). For that, use the GameCamera2D instead, and set it's Projection to Perspective.
Also note that you'll have to create a Plane in your scene to act as a background.
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@klarax is correct (thanks!) - you can place a GameCamera prefab in the scene and use that instead. Since your game is 2.5D, and GameCameras are intended for 3D games, it won't be listed in your Scene Manager - but you can still find it in your Project window under /Assets/AdventureCreator/Prefabs/Camera.
However, I'm guessing that when the camera moves, you'll want perspective to remain the same (i.e. a Ken Burns effect). For that, use the GameCamera2D instead, and set it's Projection to Perspective.
Also note that you'll have to create a Plane in your scene to act as a background.