In the Game window:

• Mouse spring : Click and drag with left mouse
• Camera rotate : Click and drag with right mouse
• Camera move : W,A,S,D keys

A lot of the demos display extra information as debug display gizmos in the Editor, for example the Query demos (ray cast, distance cast, etc). This display for these gizmos is in the Scene not the Game window. So keep an eye on both if in doubt:

Category	Scene	Description	Level
Hello World	1. Hello World.unity	Introductory scene for rigid body setup	Introductory
Setup	2a1. Collider Parade.unity	Demo showing various shapes for collision detection	Introductory
Setup	2b1. Motion Properties - Mass.unity	Demo showing how to explicitly set mass properties	Introductory
Setup	2b2. Motion Properties - Velocity.unity	Setting initial linear and angular velocities	Introductory
Setup	2b3. Motion Properties - Damping.unity	Demo showing the effect of linear and angular damping	Introductory
Setup	2b4. Motion Properties - Gravity Factor.unity	Demo showing the effect of per body gravity multipliers	Introductory
Setup	2b5. Motion Properties - Center of Mass.unity	Demo showing the effect of overriding center of mass and inertia tensor	Introductory
Setup	2c1. Material Properties - Friction.unity	Showing effect of different friction material values	Introductory
Setup	2c2. Material Properties - Restitution.unity	Showing effect of different restitution values	Introductory
Setup	ShapesSample.unity	Testing demo for colliders. Turn on / off spawners to test scalability	Introductory
Query	AllHitsDistanceTest.unity	Demo showing results of distance queries between multiple colliders	Introductory
Query	CastTest.unity	Demo showing the results of collider casting and ray casting	Introductory
Query	ClosestHitDistanceTest.unity	Demo showing results of distance queries	Introductory
Joints	4a. Joints Parade.unity	Demo showing a range of joint types	Introductory
Joints	Ragdoll.unity	Obligatory stack of ragdolls demo	Introductory
Modify	ModifyBroadphasePairs.unity	Filter out collision by explicitly deleting pairs from broad phase	Advanced
Modify	ModifyContactJacobians.unity	Modify the results of contact generation to produce special effects	Advanced
Modify	ModifyNarrowphaseContacts.unity	Add new user contacts to simulation pipeline	Advanced	No screenshot
Use Case	CharacterController.unity	User case demo showing a rudimentary FPS character controller	Intermediate
Use Case	Pool.unity	Demonstration of calling immediate mode physics	Intermediate
Use Case	PlanetGravity.unity	Performance demo of asteroids around a planet using SP/HP	Introductory
Use Case	RaycastCar.unity	User case demo showing a set of vehicle behaviors	Intermediate