Engine Question !!!!!!!!!!
Pretty normal for it to have a touch of play there, but not too much. Go to the local club and get someone to help you start it and he can look and makes sure it is not excessive. It will also help you by having him teach you the correct way to break it in and check out the plane and help test fly and teach you to fly. If you try yourself, you will crash it.
Have a blast. Its a fun hobby.