Start by selecting your favorite game mode from the main menu. Move your character using the arrow keys and look around with the gyroscope. Discover the Bone Dragon in the main challenge mode. Fire the dragon using your selected weapon by tapping the fire button. Evade the dragon's attacks by jumping out of the way. Pick up ammo scattered throughout the arena to keep fighting. Access the in-game shop between levels to buy new armor with collected currency. Gain experience by earning points to access higher difficulties and more powerful gear.