- Introduce `0.unity` recovery scene for testing and backup purposes.
- Add `Pump` GameObject with components including Rigidbody, CapsuleCollider, and MeshRenderer for physics interactions.
- Add `Upper` GameObject with a Transform component for hierarchical relationships.
- Configure physics parameters such as damping, constraints, and Rigidbody properties.
- Update object layers, tags, and rendering configurations for improved scene setup.