Played through some levels, and couldn't seem to get past the level after killing the fish. Some tips for future games:
- For the camera follow script or if you're using cinemachine, update the position in LateUpdate and not Update or FixedUpdate.
void LateUpdate() { cameraTransform.position = newPosition; }
And for the rocket particles, there is an option for the partciels to follow world space, and not local. So the particles won't rotate with the vehicle. The option is called SimulationSpace, and currently it's set to local. Just switch that over to World, and the particles should look a lot better ;)