Rock of Ages

I only just kind of grasped the meaning of situated immersion in tutorial this week. What I understand is that it is when you are in the space of the game in relation to the space of the game. Also that you react within the game. My question is, do you have to be a person or an animal or a living thing? Do you need to be able to see your body? I ask this because a while ago I was introduced to this ps3 game (probably available on other consoles as well) called Rock of Ages and being the kind of person that only plays straight forward piss easy games, I really enjoyed this one.

This is a game where you are basically a rock (in third person/rock trailing perspective), well actually a god's hand controlling the rock but you thats irrelevant because all you really see is the rock. Using the analogue stick you roll/drive the rock with your invisible forces to over come obstacles and knock down the door at the end of the track and squish the person inside. At the same time an enemy rock is doing the same thing and trying to smash your door and squish your person. crashing into enemy obstacles give you money but also weakens your rock making it smaller and therefore needing more attempts to smash the door. In between rolling you must also build obstacles for the opponent using a top down perspective. The first one to squish the other one wins. There are a variety of tracks you can choose to play.

                                          Watch from around 2min point

How this relates to the idea of situated immersion is that despite being although as the rock you feel a sense of situated immersion, it seems ambiguous who or what you actually are; whether you are the rock, drive the rock, or just oversee construction and battle. If not all the aspects of your playing involve you being in the game, is it still situated immersion that is happening? Or can you say that is this game you experience 'moments' of situated immersion?

ahhh word vomit...have a good weekend all!