Well I'm making a game about dæmons. I don't want to explain what dæmons are so if you want to know just read his dark materials or go to the daemon forum. And well dæmons change animal forms so my main characters form is a cat but well say I'm running and I reach a dæmon coin and when I touch it some text appears saying I need to press say O to change into a bird and then I can use the arrow keys to move as the bird. How do I do that like press a certain key and like change forms?