There is no end to the game, there is a soft cap on the score tho ; you can only survive as long as your speed is higher or equal to the dragon's rotation. my best score is 1070 so far. The score is influenced with the number of spears you collected.
simply put, you maximize your score the faster you collect the spears and climb back up. If you have a score higher than 1000, you can consider yourself having beaten the game!
Sure, if it motivate you, let me share with you my code for the up/down camera limitation (if that's what you meant, otherwise DM me it will be my pleasure to help if you want) :
if Input.is_action_pressed("camera_up") and gimbal_camera.rotation.x >= -1:
gimbal_camera.rotate_x(deg_to_rad(-1.8))
print("camera up ",gimbal_camera.rotation.x)
#self.rotate_y(camera_pivot.rotation.)
else:
pivot_camera.rotation = Vector3.ZERO
if Input.is_action_pressed("camera_down") and gimbal_camera.rotation.x <= 1:
gimbal_camera.rotate_x(deg_to_rad(1.8))
print("camera down ",gimbal_camera.rotation.x)
#self.rotation.y = (camera_pivot.rotation.y)
Thanks for you kind word!