I saw another player in my map. Was i hacked or its a glitch?

It looks perfectly normal to me. It's just another player who happens to be at the same level as you, surely?

@Bolaruler85

a belated respone to your query.😉 What you see are actually icons that represent the players present in your Friends list. They are spread along the map at the levels they have reached. It's a bit like your friend community accompanying you whilst you play 😊