There are several ways to get bills in the game:

1. Completing quests

2. Receiving a daily bonus

3. Spinning the fortune wheel after completing a puzzle

4. Purchasing them in the in-game Shop

5. Subscribing to the game

To access your quests, tap on "Quests" in the bottom left corner.

Here are the ways you can use bills:

1. Buy special furniture or decorations that require bills instead of coins. These items have green icons and bill signs next to their prices.

2. Buy furniture or decorations with ad labels instantly and skip the ads.

3. Buy energy from the Energy Shop.

4. Buy boosters when you run out of them.

5. Get access to paid puzzles that are marked with a bill label.