From what I remember of raising my Navvy that was typical for her too at that age. It's like they're just becoming cognizant of their surroundings, and they know how vulnerable they are so everything intimidates them. They are starting to become familiar with how their body moves, yet know they must be able to get to the "bolt hole" (or whatever serves in their situation) at the slightest perceived threat.
Here is Navvy at around six weeks old studying her surroundings after I brought her downstairs one morning. She seems very aware of the noises of my brother breathing loudly in the vicinity. She is learning how her body works.
https://youtu.be/OlP5G3ObkNU
EDIT: Yikes, shaky phone syndrome. Hope you don't get seasick looking at it.