No need to press any keys, simply click on the tree, then the two dragons you want to breed. YOU MUST CLICK THE TREE BEFORE CLICKING THE PARENTS Possible breeds are equal to forty, so I will not list them. You start with a fire dragon, a sea dragon, an ice dragon, a sky dragon, and an earth dragon in that order.
Thank you to my sister for testing the game and coloring some of the dragons. Also, if you want a dragon to be added, put a species name and coloration into the comments and I'll add it