Balloon Cargo

1. Fun

1.1. Popping

1.2. Static

1.3. Sounds

1.4. Manipulation

1.5. Lifting

1.6. Height

1.7. Bouncing

1.8. Suspense

2. Things to consider

2.1. Upgrades

2.2. Levels

2.3. Ultimate Goal

3. Core Gameplay

3.1. Floating

3.2. Swiping

3.3. Physics

4. Other Mechanics

4.1. Sorting

4.2. Timing

4.3. Puzzle

4.4. Static

4.5. Obstacles

5. Possible Ideas?

5.1. Vibration

5.2. Light Flash

5.3. Bonus Levels

5.4. Themes