2Dゲームを作りたいと思い、Unityちゃん2Dをアセットストアから入手してきたのですが、いきなりエラーをはかれて困ってしまっています。

新規でUnityプロジェクト作成→「UnityChan2D.unitypackage」を入れたのですが、それだけではダメなのでしょうか。
なにか事前に入れるファイル当あったら教えていただければと思います。

Assets/UnityChan2D/Demo/Scripts/AudioSourceController.cs(27,14): error CS1061:
Type `UnityEngine.Component' does not contain a definition for `PlayOneShot' and no extension method `PlayOneShot' of type `UnityEngine.Component' could be found. Are you missing an assembly reference?

Assets/UnityChan2D/Demo/Scripts/IntroCameraController.cs(18,47): error CS1061:
Type `UnityEngine.Component' does not contain a definition for `clip' and no extension method `clip' of type `UnityEngine.Component' could be found. Are you missing an assembly reference?


Assets/UnityChan2D/Demo/Scripts/IntroCameraController.cs(25,104): error CS1061:
Type `UnityEngine.Component' does not contain a definition for `clip' and no extension method `clip' of type `UnityEngine.Component' could be found. Are you missing an assembly reference?


Assets/UnityChan2D/Scripts/UnityChan2DController.cs(39,24): error CS0619:
`UnityEngine.BoxCollider2D.center' is obsolete: `BoxCollider2D.center has been deprecated. Use BoxCollider2D.offset instead (UnityUpgradable) -> offset'