Compilation error (line 1, col 7): The type or namespace name 'UnityEngine' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 3, col 30): The type or namespace name 'MonoBehaviour' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 7, col 33): The type or namespace name 'Collider' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 5, col 6): The type or namespace name 'SerializeFieldAttribute' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 5, col 6): The type or namespace name 'SerializeField' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 1, col 1): Program does not contain a static 'Main' method suitable for an entry point
Compilation error (line 11, col 13): The name 'GameManager' does not exist in the current context