added better walls to arena

Zookeepers Trial/.vs/Zookeepers Trial/v14/.suo

Zookeepers Trial/Assets/Scenes/arena.unity

Zookeepers Trial/Library/CrashedAssetImports.txt

Zookeepers Trial/Library/CurrentLayout.dwlt

Zookeepers Trial/Library/LastSceneManagerSetup.txt

...eepers Trial/Library/ScriptAssemblies/Assembly-CSharp.dll

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Zookeepers Trial/Library/assetDatabase3

Zookeepers Trial/Library/expandedItems

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