Physics is the core mechanic here, and the game uses some wonky physics to make tasks harder. Plain click and drag to move the Hippo family through the airport.
Click and drag to move the Hippo family, repair planes, and find their bags.
The main mechanic is physics, and the stated control is click and drag. The objective is to move the Hippo family through the airport, find their bags, and repair planes.
Clicking slowly helps with the wonky controls, most of the time. You need to drag the family to find bags and repair planes.
Q: What are the controls? A: Click and drag.
Q: What is the objective? A: Move the Hippo family, find bags, and repair planes.
Q: What stated feature is there? A: Not stated.
Q: What is the main mechanic? A: Physics.