We are wrapping up this chapter with some elements still left undone, but you already have the ability to do this on your own. There are still all the sounds, background art, and front end to build. Not only that, but you may have noticed that the player cannot be killed. Making the player invincible made it easier for us to test out the boss battle, so try the fight again after you have added it in. The boss battle is pretty difficult, but also easily altered. Why not try changing up the timing in each phase or try adjusting the values of the damage. To take this even further you can build levels and enemies that lead up to the battle. Have fun with it and it could look something like the following screenshot below!