I wouldn’t describe it as a single level, because there is some recursiveness involved, and different parts of an experience may involve a different “strength” (like individual tangled weeds have different strengths) or a different number of levels. I think of it as having an organic shape.

I also don’t think consciousness is black and white, there is certainly a spectrum. To us, qualia have complex, multi-faceted and multi-layered textures, in line with what we can cognitively perceive and process, and they trigger just-as-complex associations and emotions. It seems to me that this richness is a large part of what makes consciousness wondrous.

I don’t think a Roomba is observing its own internal processing. A program that debugs/profiles its own execution and uses those data as inputs of its main functions, or a neural network that feeds back the changing weights of its edges as additional inputs for itself, would maybe come closer to asking that question.

As an analogy, does a simple light sensor qualify as “seeing”? “Seeing” on the level of a mammal, with object and motion recognition and building an internal spacial model of what it sees, along with predicting what will happen in the next moments based on what it sees, is certainly on a whole other level.