How do I move to a higher game level?

When the sum of your dog's health, loyalty and training reaches 27500, you are automatically transferred to level 2 of the game. When it reaches 27500, you are transferred to level 3, and at 27600 you are transferred to level 4, at 27600 you go to level 5, at 27700 you go to level 6 and level 7, at 27800 you go to level 8 and 9.