Use the Advertisement Boosts
If you have an extra moment to spare, Puppy Town has plenty of boosts that you can get from watching advertisements. They are extremely helpful if you can deal with sitting through random ads.
The first kind of advertisement you will likely see are the ones that randomly spawn as you are playing the game. Puppy balloons that are attached to random objects will fly by, and if you tap them you can watch them for a corresponding reward.
On the right side of the main menu you can also manually watch advertisements to give yourself various boosts. The first one is auto-merge: when this boost is active, all puppies in your kennel will merge automatically. Helpful for when you are away from the game!
The second boost is double money. All sources of money in the game when this boost is active are doubled, making it very easy to rack up the cash!
