2D Character Switching HELP!

Hi, I'm making a game similar to Geometry Dash, and I need help with changing the Player from his Normal "Jumping" state to his "Flying" state when he touches the "Portal", and back again when he hits the other "Portal". I have an empty game object with all the colliders and physics, and the player is just a child of the Empty, so that the animations don't mess with the colliders. the flying player has no animations, so it's just a single Game Object with some flying code. Please post code snippets in c# please, I have no intention of learning JavaScript.